net: phy: marvell: Fix inconsistent indenting in led_blink_set

Fix inconsistent indeinting in m88e1318_led_blink_set reported by kernel
test robot, probably done by the presence of an if condition dropped in
later revision of the same code.
Reported-by: kernel test robot <lkp@intel.com>
Link: https://lore.kernel.org/oe-kbuild-all/202304240007.0VEX8QYG-lkp@intel.com/
Fixes: ea9e8648 ("net: phy: marvell: Implement led_blink_set()")
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lore.kernel.org/r/20230423172800.3470-1-ansuelsmth@gmail.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>