arm: vexpress: Move the poweroff/restart code to drivers/power/reset

This patch moves the arch/arm/mach-vexpress/reset.c functionality to
drivers/platform/reset/ and adds the necessary Kconfig wiring.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Pawel Moll <pawel.moll@arm.com>
diff --git a/arch/arm/mach-vexpress/Kconfig b/arch/arm/mach-vexpress/Kconfig
index 52d315b..0f1c5e5 100644
--- a/arch/arm/mach-vexpress/Kconfig
+++ b/arch/arm/mach-vexpress/Kconfig
@@ -17,6 +17,9 @@
 	select NO_IOPORT
 	select PLAT_VERSATILE
 	select PLAT_VERSATILE_CLCD
+	select POWER_RESET
+	select POWER_RESET_VEXPRESS
+	select POWER_SUPPLY
 	select REGULATOR_FIXED_VOLTAGE if REGULATOR
 	select VEXPRESS_CONFIG
 	help