drivers/rtc/rtc-ds1685.c: remove .owner assignment from platform_driver

The rtc driver core now sets the platform_driver 'owner' property, so
remove the assignment from the DS1685 driver.

Fixes: aaaf5fbf: "rtc: add driver for DS1685 family of real time clocks"
Signed-off-by: Joshua Kinard <kumba@gentoo.org>
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>