odroid-go2: do not disable EFI

Remove the unset of the EFI loader, it's possible for U-Boot to
provide a EFI environment on this board, and it's also required by
the FreeBSD loader which mandated EFI on Aarch64.

Signed-off-by: Roger Pau Monné <royger@FreeBSD.org>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
diff --git a/configs/odroid-go2_defconfig b/configs/odroid-go2_defconfig
index 5632b15..be7ba09 100644
--- a/configs/odroid-go2_defconfig
+++ b/configs/odroid-go2_defconfig
@@ -109,4 +109,3 @@
 CONFIG_TPL_TINY_MEMSET=y
 CONFIG_LZO=y
 CONFIG_ERRNO_STR=y
-# CONFIG_EFI_LOADER is not set