reset: sti/syscfg: replace comma with semicolon

Fixes a checkpatch warning:

  WARNING: Possible comma where semicolon could be used
  #156: FILE: drivers/reset/sti/reset-syscfg.c:156:
  +	rc->rst.ops = &syscfg_reset_ops,
  +	rc->rst.of_node = dev->of_node;

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>