rtc-wm8350: retries will reach -1

With a postfix decrement retries will reach -1 rather than 0, so the
warning and error-out will not occur.

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --cc drivers/rtc/rtc-wm8350.c
Simple merge