sunxi: Enable support for the eMMC found on the orangepi plus

This enables support for the eMMC found on the orangepi plus.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>

configs/orangepi_plus_defconfig

@@ -4,6 +4,8 @@ CONFIG_MACH_SUN8I_H3=y
 CONFIG_DRAM_CLK=672
 CONFIG_DRAM_ZQ=3881979
 CONFIG_DRAM_ODT_EN=y
+CONFIG_MMC0_CD_PIN="PF6"
+CONFIG_MMC_SUNXI_SLOT_EXTRA=2
 # CONFIG_VIDEO is not set
 CONFIG_DEFAULT_DEVICE_TREE="sun8i-h3-orangepi-plus"
 # CONFIG_SYS_MALLOC_CLEAR_ON_INIT is not set