ARM: UniPhier: add pin mux setting for NAND CS1 of PH1-Pro4

The chip select 1 of the NAND controller is available if you want to
use, although the pins are shared with UART port 2.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

arch/arm/mach-uniphier/ph1-pro4/pinctrl.c

@@ -27,6 +27,8 @@ void pin_init(void)
 	sg_set_pinsel(52, 0);	/* XNFWP  -> XNFWP */
 	sg_set_pinsel(53, 0);	/* XNFCE0 -> XNFCE0 */
 	sg_set_pinsel(54, 0);	/* NRYBY0 -> NRYBY0 */
+	/* sg_set_pinsel(131, 1); */	/* RXD2   -> NRYBY1 */
+	/* sg_set_pinsel(132, 1); */	/* TXD2   -> XNFCE1 */
 #endif
 
 #ifdef CONFIG_USB_XHCI_UNIPHIER