ARM: oxnas: Add OX820 config and makefile entry

Refactor the oxnas Kconfig entries among the OX810SE and OX820 configs,
and add the files to support the OX820 SMP feature.
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>

arch/arm/Makefile

@@ -191,6 +191,7 @@ machine-$(CONFIG_ARCH_MXS)		+= mxs
 machine-$(CONFIG_ARCH_NETX)		+= netx
 machine-$(CONFIG_ARCH_NOMADIK)		+= nomadik
 machine-$(CONFIG_ARCH_NSPIRE)		+= nspire
+machine-$(CONFIG_ARCH_OXNAS)		+= oxnas
 machine-$(CONFIG_ARCH_OMAP1)		+= omap1
 machine-$(CONFIG_ARCH_OMAP2PLUS)	+= omap2
 machine-$(CONFIG_ARCH_ORION5X)		+= orion5x

arch/arm/mach-oxnas/Kconfig

 menuconfig ARCH_OXNAS
 	bool "Oxford Semiconductor OXNAS Family SoCs"
 	select ARCH_HAS_RESET_CONTROLLER
+	select COMMON_CLK_OXNAS
 	select GPIOLIB
+	select MFD_SYSCON
+	select OXNAS_RPS_TIMER
+	select PINCTRL_OXNAS
+	select RESET_CONTROLLER
+	select RESET_OXNAS
+	select VERSATILE_FPGA_IRQ
 	select PINCTRL
-	depends on ARCH_MULTI_V5
+	depends on ARCH_MULTI_V5 || ARCH_MULTI_V6
 	help
 	  Support for OxNas SoC family developed by Oxford Semiconductor.
 
@@ -11,16 +18,21 @@ if ARCH_OXNAS
 
 config MACH_OX810SE
 	bool "Support OX810SE Based Products"
-	select ARCH_HAS_RESET_CONTROLLER
-	select COMMON_CLK_OXNAS
+	depends on ARCH_MULTI_V5
 	select CPU_ARM926T
-	select MFD_SYSCON
-	select OXNAS_RPS_TIMER
-	select PINCTRL_OXNAS
-	select RESET_CONTROLLER
-	select RESET_OXNAS
-	select VERSATILE_FPGA_IRQ
 	help
 	  Include Support for the Oxford Semiconductor OX810SE SoC Based Products.
 
+config MACH_OX820
+	bool "Support OX820 Based Products"
+	depends on ARCH_MULTI_V6
+	select ARM_GIC
+	select DMA_CACHE_RWFO if SMP
+	select CPU_V6K
+	select HAVE_SMP
+	select HAVE_ARM_SCU if SMP
+	select HAVE_ARM_TWD if SMP
+	help
+	  Include Support for the Oxford Semiconductor OX820 SoC Based Products.
+
 endif