pinctrl: aspeed: Add SGPM pinmux

Add SGPM pinmux to ast2500-pinctrl function and group, to prepare for
supporting SGPIO in AST2500 SoC.

Signed-off-by: Hongwei Zhang <hongweiz@ami.com>
Reviewed-by: Andrew Jeffery <andrew@aj.id.au>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/aspeed/pinctrl-aspeed-g5.c

@@ -577,6 +577,8 @@ SS_PIN_DECL(N3, GPIOJ2, SGPMO);
 SIG_EXPR_LIST_DECL_SINGLE(SGPMI, SGPM, SIG_DESC_SET(SCU84, 11));
 SS_PIN_DECL(N4, GPIOJ3, SGPMI);
 
+FUNC_GROUP_DECL(SGPM, R2, L2, N3, N4);
+
 #define N5 76
 SIG_EXPR_LIST_DECL_SINGLE(VGAHS, VGAHS, SIG_DESC_SET(SCU84, 12));
 SIG_EXPR_LIST_DECL_SINGLE(DASHN5, DASHN5, SIG_DESC_SET(SCU94, 8));
@@ -2127,6 +2129,7 @@ static const struct aspeed_pin_group aspeed_g5_groups[] = {
 	ASPEED_PINCTRL_GROUP(SD2),
 	ASPEED_PINCTRL_GROUP(SDA1),
 	ASPEED_PINCTRL_GROUP(SDA2),
+	ASPEED_PINCTRL_GROUP(SGPM),
 	ASPEED_PINCTRL_GROUP(SGPS1),
 	ASPEED_PINCTRL_GROUP(SGPS2),
 	ASPEED_PINCTRL_GROUP(SIOONCTRL),
@@ -2296,6 +2299,7 @@ static const struct aspeed_pin_function aspeed_g5_functions[] = {
 	ASPEED_PINCTRL_FUNC(SD2),
 	ASPEED_PINCTRL_FUNC(SDA1),
 	ASPEED_PINCTRL_FUNC(SDA2),
+	ASPEED_PINCTRL_FUNC(SGPM),
 	ASPEED_PINCTRL_FUNC(SGPS1),
 	ASPEED_PINCTRL_FUNC(SGPS2),
 	ASPEED_PINCTRL_FUNC(SIOONCTRL),