drivers/rtc/rtc-mpc5121.c: remove space before tab

  WARNING: please, no space before tabs
Signed-off-by: NSachin Kamat <sachin.kamat@linaro.org>
Cc: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>