realtek: refresh 'add-pcs-rtl-otto' patch

Refresh the patch to account for recent changes in the generic kernel
patches. Makes the CI kernel patch check happy again.

Fixes: c271123 ("generic: 6.18: fix MediaTek USXGMII driver")
Signed-off-by: Jonas Jelonek <jelonek.jonas@gmail.com>
Link: openwrt/openwrt#23127
Signed-off-by: Robert Marko <robimarko@gmail.com>

Author: jonasjelonek

target/linux/realtek/patches-6.18/730-add-pcs-rtl-otto.patch

@@ -11,7 +11,7 @@ Signed-off-by: Markus Stockhausen <markus.stockhausen@gmx.de>
 ---
 --- a/drivers/net/pcs/Kconfig
 +++ b/drivers/net/pcs/Kconfig
-@@ -45,6 +45,15 @@ config PCS_MTK_USXGMII
+@@ -46,6 +46,15 @@ config PCS_MTK_USXGMII
  	  1000Base-X, 2500Base-X and Cisco SGMII are supported on the same
  	  differential pairs via an embedded LynxI PCS.