at91: fix SAMA5D3 subtarget

Add required architecture overrides to enable SAMA5 boards in Kconfig, add
resulting missing symbols, reorder config and remove unrelated XEN setting.

Signed-off-by: Jo-Philipp Wich <jo@mein.io>

target/linux/at91/config-4.4

@@ -251,7 +251,6 @@ CONFIG_SPI_SPIDEV=y
 CONFIG_SPLIT_PTLOCK_CPUS=999999
 CONFIG_SRCU=y
 # CONFIG_STAGING is not set
-# CONFIG_SUNXI_SRAM is not set
 CONFIG_SWIOTLB=y
 CONFIG_SYS_SUPPORTS_APM_EMULATION=y
 CONFIG_TICK_CPU_ACCOUNTING=y

target/linux/at91/sama5d3/config-default

+# CONFIG_ARCH_MULTI_V4_V5 is not set
+# CONFIG_ARCH_MULTI_V5 is not set
+CONFIG_ARCH_MULTI_V7=y
+# CONFIG_ARM_LPAE is not set
+# CONFIG_ARM_THUMBEE is not set
+# CONFIG_CPU_ICACHE_DISABLE is not set
+# CONFIG_CPU_BPREDICT_DISABLE is not set
 CONFIG_SOC_SAMA5=y
 # CONFIG_SOC_SAM_V4_V5 is not set
 CONFIG_SOC_SAM_V7=y
+CONFIG_SOC_SAMA5D2=y
 CONFIG_SOC_SAMA5D3=y
 CONFIG_SOC_SAMA5D4=y
 CONFIG_MACH_SAMA5_DT=y
-# CONFIG_ARM_LPAE is not set
-# CONFIG_ARM_THUMBEE is not set
+CONFIG_PL310_ERRATA_588369=y
+CONFIG_PL310_ERRATA_727915=y
+CONFIG_PL310_ERRATA_753970=y
+CONFIG_PL310_ERRATA_769419=y
 # CONFIG_SWP_EMULATE is not set
-# CONFIG_CPU_ICACHE_DISABLE is not set
-# CONFIG_CPU_BPREDICT_DISABLE is not set
 # CONFIG_THUMB2_KERNEL is not set
-# CONFIG_XEN is not set