rtc-x1205: unconditionally set date when setting clock

All callsites of x1205_set_datetime() want the date to be set as well, so
remove the flag parameter and set it unconditionally.

Signed-off-by: Johannes Weiner <jw@emlix.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Paul Gortmaker <p_gortmaker@yahoo.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>