sunxi: add UART0 setup for H6

The UART0 on H6 is available at PH bank (and PF bank, but the PF one is
muxed with SD card).

Add pinmux configuration.

Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Acked-by: Maxime Ripard <maxime.ripard@bootlin.com>
Reviewed-by: Jagan Teki <jagan@openedev.com>
Tested-by: Jagan Teki <jagan@amarulasolutions.com>

arch/arm/include/asm/arch-sunxi/gpio.h

@@ -198,6 +198,7 @@ enum sunxi_gpio_number {
 #define SUN6I_GPH_TWI2		2
 #define SUN6I_GPH_UART0		2
 #define SUN9I_GPH_UART0		2
+#define SUN50I_H6_GPH_UART0	2
 
 #define SUNXI_GPI_SDC3		2
 #define SUN7I_GPI_TWI3		3

arch/arm/mach-sunxi/board.c

@@ -107,6 +107,10 @@ static int gpio_init(void)
 	sunxi_gpio_set_cfgpin(SUNXI_GPB(8), SUN50I_GPB_UART0);
 	sunxi_gpio_set_cfgpin(SUNXI_GPB(9), SUN50I_GPB_UART0);
 	sunxi_gpio_set_pull(SUNXI_GPB(9), SUNXI_GPIO_PULL_UP);
+#elif CONFIG_CONS_INDEX == 1 && defined(CONFIG_MACH_SUN50I_H6)
+	sunxi_gpio_set_cfgpin(SUNXI_GPH(0), SUN50I_H6_GPH_UART0);
+	sunxi_gpio_set_cfgpin(SUNXI_GPH(1), SUN50I_H6_GPH_UART0);
+	sunxi_gpio_set_pull(SUNXI_GPH(1), SUNXI_GPIO_PULL_UP);
 #elif CONFIG_CONS_INDEX == 1 && defined(CONFIG_MACH_SUN8I_A83T)
 	sunxi_gpio_set_cfgpin(SUNXI_GPB(9), SUN8I_A83T_GPB_UART0);
 	sunxi_gpio_set_cfgpin(SUNXI_GPB(10), SUN8I_A83T_GPB_UART0);