ARM: EXYNOS: Add missing static storage class specifiers in clock-exynos5.c

Fixes the following warnings:
arch/arm/mach-exynos/clock-exynos5.c:300:19: warning:
symbol 'exynos5_clk_mout_mpll' was not declared. Should it be static?
arch/arm/mach-exynos/clock-exynos5.c:475:12: warning:
symbol 'exynos5_clkset_aclk_top_list' was not declared. Should it be static?
arch/arm/mach-exynos/clock-exynos5.c:480:23: warning:
symbol 'exynos5_clkset_aclk' was not declared. Should it be static?
arch/arm/mach-exynos/clock-exynos5.c:494:12: warning:
symbol 'exynos5_clkset_aclk_333_166_list' was not declared. Should it be static?
arch/arm/mach-exynos/clock-exynos5.c:499:23: warning:
symbol 'exynos5_clkset_aclk_333_166' was not declared. Should it be static?
arch/arm/mach-exynos/clock-exynos5.c:989:12: warning:
symbol 'exynos5_clkset_group_list' was not declared. Should it be static?
arch/arm/mach-exynos/clock-exynos5.c:1002:23: warning:
symbol 'exynos5_clkset_group' was not declared. Should it be static?
arch/arm/mach-exynos/clock-exynos5.c:1218:19: warning:
symbol 'exynos5_clk_sclk_fimd1' was not declared. Should it be static?
arch/arm/mach-exynos/clock-exynos5.c:1499:20: warning:
symbol 'exynos5_clock_syscore_ops' was not declared. Should it be static?

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>