bus: ti-sysc: Fix variable set but not used warning for reinit_modules

Fix drivers/bus/ti-sysc.c:2494:13: error: variable 'error' set but not
used introduced by commit 9d881361

 ("bus: ti-sysc: Add quirk handling
for reinit on context lost").

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>