sh-pfc: r8a7740: Declare missing INTC function

When adding the INTC pin groups the INTC function hasn't been added to
the functions list. Fix it.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

drivers/pinctrl/sh-pfc/pfc-r8a7740.c

@@ -2694,6 +2694,7 @@ static const char * const sdhi2_groups[] = {
 };
 
 static const struct sh_pfc_function pinmux_functions[] = {
+	SH_PFC_FUNCTION(intc),
 	SH_PFC_FUNCTION(lcd0),
 	SH_PFC_FUNCTION(lcd1),
 	SH_PFC_FUNCTION(mmc0),