ARM: at91: cpuidle: Move driver to drivers/cpuidle

As the cpuidle driver code has no more the dependency with the pm code, the
'standby' callback being passed as a parameter to the device's platform data,
we can move the cpuidle driver in the drivers/cpuidle directory.

Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>

Conflicts:

	drivers/cpuidle/Kconfig.arm
	drivers/cpuidle/Makefile
diff --git a/drivers/cpuidle/Kconfig.arm b/drivers/cpuidle/Kconfig.arm
index 6a7e6f2..f23bd75 100644
--- a/drivers/cpuidle/Kconfig.arm
+++ b/drivers/cpuidle/Kconfig.arm
@@ -37,3 +37,10 @@
 	depends on ARCH_U8500
 	help
 	  Select this to enable cpuidle for ST-E u8500 processors
+
+config ARM_AT91_CPUIDLE
+	bool "Cpu Idle Driver for the AT91 processors"
+	default y
+	depends on ARCH_AT91
+	help
+	  Select this to enable cpuidle for AT91 processors