pinctrl: sh-pfc: r8a7794: Fix GP2[29] muxing

GP2[29] muxing is controlled by 2-bit IP6[3:2] field, yet only 3 values
are listed instead of 4...

[Sergei: fixed up the formatting, renamed, added the changelog.]
Signed-off-by: Andrey Gusakov <andrey.gusakov@cogentembedded.com>
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

drivers/pinctrl/sh-pfc/pfc-r8a7794.c

@@ -4530,6 +4530,7 @@ static const struct pinmux_cfg_reg pinmux_config_regs[] = {
 		FN_DU0_DISP, FN_QPOLA, FN_CC50_STATE30, 0,
 		/* IP6_3_2 [2] */
 		FN_DU0_EXODDF_DU0_ODDF_DISP_CDE, FN_QCPV_QDE, FN_CC50_STATE29,
+		0,
 		/* IP6_1_0 [2] */
 		FN_DU0_EXVSYNC_DU0_VSYNC, FN_QSTB_QHE, FN_CC50_STATE28, 0, }
 	},