ARM: EXYNOS: Encapsulate register access inside a function for pm
ARM: EXYNOS: Encapsulate register access inside a function for pm

That makes the code cleaner and encapsulted. The function will be
reused in the next patch.

Signed-off-by: Daniel Lezcano <e9fa45941f2ebe89c1b9d6c5f339ab42eadb8567@linaro.org>
Reviewed-by: Viresh Kumar <5ff32272b3d9f86512eddc8e0af523fc6f7924e5@linaro.org>
Reviewed-by: Bartlomiej Zolnierkiewicz <24970bf3d8506c473367e9292a8e5eb43a40bda0@samsung.com>
Reviewed-by: Tomasz Figa <c4885e520559c7b5b4fe1e9e188b924d2debd35e@samsung.com>
Signed-off-by: Kukjin Kim <3fc711f4e08bc570a586748633ff7c76d0e1e253@samsung.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs