sunxi: add MMC pinmux setup for SDC2 on sun9i

The A80 can support 8-bit eMMC with reset on the PC pingroups.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

board/sunxi/board.c

@@ -307,6 +307,13 @@ static void mmc_pinmux_setup(int sdc)
 			sunxi_gpio_set_pull(pin, SUNXI_GPIO_PULL_UP);
 			sunxi_gpio_set_drv(pin, 2);
 		}
+#elif defined(CONFIG_MACH_SUN9I)
+		/* SDC2: PC6-PC16 */
+		for (pin = SUNXI_GPC(6); pin <= SUNXI_GPC(16); pin++) {
+			sunxi_gpio_set_cfgpin(pin, SUNXI_GPC_SDC2);
+			sunxi_gpio_set_pull(pin, SUNXI_GPIO_PULL_UP);
+			sunxi_gpio_set_drv(pin, 2);
+		}
 #endif
 		break;