Maintainers.txt: add Aaron Young as MptScsi and PvScsi reviewer

I asked Aaron if he'd be willing to take the "R" role for the MptScsi and
PvScsi drivers in OvmfPkg, given their low maintenance needs and previous
commit 1774a44 ("Maintainers.txt: Remove MptScsi and PvScsi
reviewers", 2022-07-28). Designate Aaron as reviewer for those drivers,
with many thanks.

Cc: Aaron Young <[email protected]>
Cc: Andrew Fish <[email protected]>
Cc: Ard Biesheuvel <[email protected]>
Cc: Gerd Hoffmann <[email protected]>
Cc: Jiewen Yao <[email protected]>
Cc: Leif Lindholm <[email protected]>
Cc: Michael D Kinney <[email protected]>
Signed-off-by: Laszlo Ersek <[email protected]>
Message-Id: <[email protected]>
Reviewed-by: Aaron Young <[email protected]>

Maintainers.txt

@@ -519,6 +519,11 @@ OvmfPkg: LsiScsi driver
 F: OvmfPkg/LsiScsiDxe/
 R: Gary Lin <[email protected]> [lcp]
 
+OvmfPkg: MptScsi and PVSCSI driver
+F: OvmfPkg/MptScsiDxe/
+F: OvmfPkg/PvScsiDxe/
+R: Aaron Young <[email protected]> [ajyoung-oracle]
+
 OvmfPkg: TCG- and TPM2-related modules
 F: OvmfPkg/Include/IndustryStandard/QemuTpm.h
 F: OvmfPkg/Library/PlatformBootManagerLib/BdsPlatform.c