ARM: dts: microchip: sam9x60: Add missing property atmel,usart-mode

[ Upstream commit 2f9d013a0c6f1b9109ada5acb28ee26eefc77c03 ]

Add the atmel,usart-mode property to the UART nodes. This ensures
compliance with the atmel,at91-usart.yaml schema and resolves the errors
below:
serial@200: $nodename:0: 'serial@200' does not match
'^spi(@.*|-([0-9]|[1-9][0-9]+))?$'
serial@200: atmel,use-dma-rx: False schema does not allow True
serial@200: atmel,use-dma-tx: False schema does not allow True
serial@200: atmel,fifo-size: False schema does not allow [[16]]

These errors indicate that the property
atmel,usart-mode = <AT91_USART_MODE_SERIAL> is missing for
UART nodes 0, 1, 2, 3, 4, 6, 7, 8, 9, 10, 11, and 12.

Fixes: 99c8083 ("ARM: dts: at91: sam9x60: Add missing flexcom definitions")
Acked-by: Nicolas Ferre <[email protected]>
Signed-off-by: Andrei Simion <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
[claudiu.beznea: move the atmel,usart-mode close to vendor specific
 properties to cope with DTS coding style]
Signed-off-by: Claudiu Beznea <[email protected]>
Signed-off-by: Sasha Levin <[email protected]>
(cherry picked from commit a78ef8be2f89e0d2a2eb34ab3366d161ca44b71b)

arch/arm/boot/dts/microchip/sam9x60.dtsi

@@ -186,6 +186,7 @@
 					dma-names = "tx", "rx";
 					clocks = <&pmc PMC_TYPE_PERIPHERAL 13>;
 					clock-names = "usart";
+					atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 					atmel,use-dma-rx;
 					atmel,use-dma-tx;
 					atmel,fifo-size = <16>;
@@ -384,6 +385,7 @@
 					dma-names = "tx", "rx";
 					clocks = <&pmc PMC_TYPE_PERIPHERAL 32>;
 					clock-names = "usart";
+					atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 					atmel,use-dma-rx;
 					atmel,use-dma-tx;
 					atmel,fifo-size = <16>;
@@ -433,6 +435,7 @@
 					dma-names = "tx", "rx";
 					clocks = <&pmc PMC_TYPE_PERIPHERAL 33>;
 					clock-names = "usart";
+					atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 					atmel,use-dma-rx;
 					atmel,use-dma-tx;
 					atmel,fifo-size = <16>;
@@ -590,6 +593,7 @@
 					dma-names = "tx", "rx";
 					clocks = <&pmc PMC_TYPE_PERIPHERAL 9>;
 					clock-names = "usart";
+					atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 					atmel,use-dma-rx;
 					atmel,use-dma-tx;
 					atmel,fifo-size = <16>;
@@ -639,6 +643,7 @@
 					dma-names = "tx", "rx";
 					clocks = <&pmc PMC_TYPE_PERIPHERAL 10>;
 					clock-names = "usart";
+					atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 					atmel,use-dma-rx;
 					atmel,use-dma-tx;
 					atmel,fifo-size = <16>;
@@ -688,6 +693,7 @@
 					dma-names = "tx", "rx";
 					clocks = <&pmc PMC_TYPE_PERIPHERAL 11>;
 					clock-names = "usart";
+					atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 					atmel,use-dma-rx;
 					atmel,use-dma-tx;
 					atmel,fifo-size = <16>;
@@ -737,6 +743,7 @@
 					dma-names = "tx", "rx";
 					clocks = <&pmc PMC_TYPE_PERIPHERAL 5>;
 					clock-names = "usart";
+					atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 					atmel,use-dma-rx;
 					atmel,use-dma-tx;
 					atmel,fifo-size = <16>;
@@ -805,6 +812,7 @@
 					dma-names = "tx", "rx";
 					clocks = <&pmc PMC_TYPE_PERIPHERAL 6>;
 					clock-names = "usart";
+					atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 					atmel,use-dma-rx;
 					atmel,use-dma-tx;
 					atmel,fifo-size = <16>;
@@ -873,6 +881,7 @@
 					dma-names = "tx", "rx";
 					clocks = <&pmc PMC_TYPE_PERIPHERAL 7>;
 					clock-names = "usart";
+					atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 					atmel,use-dma-rx;
 					atmel,use-dma-tx;
 					atmel,fifo-size = <16>;
@@ -941,6 +950,7 @@
 					dma-names = "tx", "rx";
 					clocks = <&pmc PMC_TYPE_PERIPHERAL 8>;
 					clock-names = "usart";
+					atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 					atmel,use-dma-rx;
 					atmel,use-dma-tx;
 					atmel,fifo-size = <16>;
@@ -1064,6 +1074,7 @@
 					dma-names = "tx", "rx";
 					clocks = <&pmc PMC_TYPE_PERIPHERAL 15>;
 					clock-names = "usart";
+					atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 					atmel,use-dma-rx;
 					atmel,use-dma-tx;
 					atmel,fifo-size = <16>;
@@ -1113,6 +1124,7 @@
 					dma-names = "tx", "rx";
 					clocks = <&pmc PMC_TYPE_PERIPHERAL 16>;
 					clock-names = "usart";
+					atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 					atmel,use-dma-rx;
 					atmel,use-dma-tx;
 					atmel,fifo-size = <16>;