ARM: dts: renesas: blanche: Fix typo in GP_11_2 pin name

On blanche, the GPIO keyboard fails to probe with:

    sh-pfc e6060000.pinctrl: could not map pin config for "GP_11_02"

Fix this by correcting the name for this pin to "GP_11_2".

Fixes: 1f27fede ("ARM: dts: blanche: Configure pull-up for SOFT_SW and SW25 GPIO keys")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/203128eca2261ffc33b83637818dd39c488f42b0.1693408326.git.geert+renesas@glider.be

arch/arm/boot/dts/renesas/r8a7792-blanche.dts

@@ -239,7 +239,7 @@ du1_pins: du1 {
 	};
 
 	keyboard_pins: keyboard {
-		pins = "GP_3_10", "GP_3_11", "GP_3_12", "GP_3_15", "GP_11_02";
+		pins = "GP_3_10", "GP_3_11", "GP_3_12", "GP_3_15", "GP_11_2";
 		bias-pull-up;
 	};