power: reset: Add AT91 poweroff driver

Add a driver to handle the shutdown of the Atmel SoCs. This code used to be
(and still is) in arch/arm/mach-at91. We didn't remove it yet so that we can
convert all the boards to using this driver, before removing it entirely in a
separate patch.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
diff --git a/drivers/power/reset/Kconfig b/drivers/power/reset/Kconfig
index 360bac7..1f9d0c5 100644
--- a/drivers/power/reset/Kconfig
+++ b/drivers/power/reset/Kconfig
@@ -14,6 +14,14 @@
 	help
 	  This driver supports turning off board via a ams AS3722 power-off.
 
+config POWER_RESET_AT91_POWEROFF
+	bool "Atmel AT91 poweroff driver"
+	depends on MACH_AT91
+	default SOC_AT91SAM9 || SOC_SAMA5
+	help
+	  This driver supports poweroff for Atmel AT91SAM9 and SAMA5
+	  SoCs
+
 config POWER_RESET_AT91_RESET
 	bool "Atmel AT91 reset driver"
 	depends on MACH_AT91