ARM: shmobile: marzen: remove SDHI0 WP pin setting from DTS

WP pin is not implemented on Marzen
Acked-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: NKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: NSimon Horman <horms+renesas@verge.net.au>

arch/arm/boot/dts/r8a7779-marzen-reference.dts

@@ -94,8 +94,7 @@
 	};
 
 	sdhi0_pins: sd0 {
-		renesas,groups = "sdhi0_data4", "sdhi0_ctrl", "sdhi0_cd",
-				 "sdhi0_wp";
+		renesas,groups = "sdhi0_data4", "sdhi0_ctrl", "sdhi0_cd";
 		renesas,function = "sdhi0";
 	};
 };