drivers/rtc/rtc-m41t80.c: remove DRV_VERSION macro

History is in git, no need for sperate versioning.  Also remove the
success printout, RTC core does it, too.

Signed-off-by: Wolfram Sang <wsa@sang-engineering.com>
Cc: Jingoo Han <jg1.han@samsung.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>