r8169: fix inconsistent indenting in rtl8169_get_eth_mac_stats

r8169: fix inconsistent indenting in rtl8169_get_eth_mac_stats

This fixes an inconsistent indenting introduced with e3fc5139bd8f
("r8169: implement additional ethtool stats ops").

Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202410220413.1gAxIJ4t-lkp@intel.com/
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20fd6f39-3c1b-4af0-9adc-7d1f49728fad@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>