sunxi: Use the available Kconfig option for AHCI

Use the already available Kconfig option for AHCI. Tested on the
BananaPi.

Signed-off-by: Jelle van der Waa <jelle@vdwaa.nl>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
diff --git a/configs/Mele_M5_defconfig b/configs/Mele_M5_defconfig
index 124dc22..fffc332 100644
--- a/configs/Mele_M5_defconfig
+++ b/configs/Mele_M5_defconfig
@@ -8,7 +8,8 @@
 CONFIG_VIDEO_COMPOSITE=y
 CONFIG_DEFAULT_DEVICE_TREE="sun7i-a20-m5"
 # CONFIG_SYS_MALLOC_CLEAR_ON_INIT is not set
-CONFIG_SYS_EXTRA_OPTIONS="SUNXI_GMAC,AHCI,STATUSLED=234"
+CONFIG_AHCI=y
+CONFIG_SYS_EXTRA_OPTIONS="SUNXI_GMAC,STATUSLED=234"
 CONFIG_SPL=y
 # CONFIG_CMD_IMLS is not set
 # CONFIG_CMD_FLASH is not set