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 --cc arch/arm/mach-at91/Makefile
Simple merge

diff --cc drivers/cpuidle/Kconfig.arm
Simple merge

diff --cc drivers/cpuidle/Makefile
Simple merge

diff --cc drivers/cpuidle/cpuidle-at91.c
Simple merge