arm64: Add platform selection for BCM2835.

Signed-off-by: NEric Anholt <eric@anholt.net>
[ kraxel: copy some selects from arm to arm64 ]
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>
Acked-by: NCatalin Marinas <catalin.marinas@arm.com>

arch/arm64/Kconfig.platforms

@@ -13,6 +13,19 @@ config ARCH_ALPINE
 	  This enables support for the Annapurna Labs Alpine
 	  Soc family.
 
+config ARCH_BCM2835
+	bool "Broadcom BCM2835 family"
+	select ARCH_REQUIRE_GPIOLIB
+	select CLKSRC_OF
+	select PINCTRL
+	select PINCTRL_BCM2835
+	select ARM_AMBA
+	select ARM_TIMER_SP804
+	select HAVE_ARM_ARCH_TIMER
+	help
+	  This enables support for the Broadcom BCM2837 SoC.
+	  This SoC is used in the Raspberry Pi 3 device.
+
 config ARCH_BCM_IPROC
 	bool "Broadcom iProc SoC Family"
 	select COMMON_CLK_IPROC