clk: samsung: exynos5420: fix register offset for sclk_bpll

This patch fixes the wrong register offset for sclk_bpll clock.

Signed-off-by: Rahul Sharma <rahul.sharma@samsung.com>
Signed-off-by: Shaik Ameer Basha <shaik.ameer@samsung.com>
Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com>
Signed-off-by: Tomasz Figa <t.figa@samsung.com>