[SL-UP] 917ncp init failure fix

[arun-silabs]

This PR fixes the init failure in 917NCP boards.
After integrating the matter_sdk code with the sl_net APIs, the init is failing because LWIP init is called twice for 917NCP.
To resolve this, we have removed the LWIP init from PlatformManager and modified the init sequence to avoid errors while booting. But, with the recent SPI related changes, we are facing SPI_BUSY error. So, reverted the recent changes made in efx32_ncp_host.c file. With these changes, the init for 917NCP is passing.

[mkardous-silabs]

Why does the efx32_ncp_host update cause errors? Did we root cause the the seen errors?

[arun-silabs]

Why does the efx32_ncp_host update cause errors? Did we root cause the the seen errors?

The error is seen during SPI transfer, sl_si91x_host_spi_transfer() - This API is throwing SPI_BUSY error. I've tried to debug, but couldn't root cause it.
The SPI issue with the latest efx32_ncp_host.c file from wifi_sdk is coming up after integrating with sl_net layer. Need to debug the exact rootcause.

[mkardous-silabs]

Why does the efx32_ncp_host update cause errors? Did we root cause the the seen errors?

The error is seen during SPI transfer, sl_si91x_host_spi_transfer() - This API is throwing SPI_BUSY error. I've tried to debug, but couldn't root cause it. The SPI issue with the latest efx32_ncp_host.c file from wifi_sdk is coming up after integrating with sl_net layer. Need to debug the exact rootcause.

Let me know when we have a better idea with what is happening with the latest efx32 ncp host file and the sl_net APIs. It might be worth while to open a Wiseconnect issue for this to get them involved.

[bhmanda-silabs]

Why does the efx32_ncp_host update cause errors? Did we root cause the the seen errors?

The error is seen during SPI transfer, sl_si91x_host_spi_transfer() - This API is throwing SPI_BUSY error. I've tried to debug, but couldn't root cause it. The SPI issue with the latest efx32_ncp_host.c file from wifi_sdk is coming up after integrating with sl_net layer. Need to debug the exact rootcause.

Let me know when we have a better idea with what is happening with the latest efx32 ncp host file and the sl_net APIs. It might be worth while to open a Wiseconnect issue for this to get them involved.

Wiseconnect ticket - https://jira.silabs.com/browse/WIFISDK-1109