Reset controller fix for v5.2

This tag removes a redundant device pointer NULL check from
__reset_control_get_from_lookup to fix a static code checker
warning.

* tag 'reset-fixes-for-v5.2' of git://git.pengutronix.de/git/pza/linux:
  reset: remove redundant null check on pointer dev

Link: https://lore.kernel.org/r/1562236626.6641.13.camel@pengutronix.deSigned-off-by: Olof Johansson <olof@lixom.net>