sunxi: Enable MMC new mode for A83T

The eMMC controller for the A83T uses the new operating mode. Enable it.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Reviewed-by: Jagan Teki <jagan@openedev.com>
diff --git a/arch/arm/mach-sunxi/Kconfig b/arch/arm/mach-sunxi/Kconfig
index 2cd7bae..2309f59 100644
--- a/arch/arm/mach-sunxi/Kconfig
+++ b/arch/arm/mach-sunxi/Kconfig
@@ -125,6 +125,7 @@
 	bool "sun8i (Allwinner A83T)"
 	select CPU_V7
 	select SUNXI_GEN_SUN6I
+	select MMC_SUNXI_HAS_NEW_MODE
 	select SUPPORT_SPL
 
 config MACH_SUN8I_H3