ARM: EXYNOS: Fixup for __raw operations in suspend.c

Fix the PMU code endian access code to deal with kernels built for
big endian operation by changing the __raw IO accessors to the
_relaxed variants.

Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>