efi_loader: Drop code that doesn't work with driver model

This code should never have been added as it builds a new feature on top
of legacy code. This has already been improved with the dependency on BLK.

Add a dependency on DM_ETH also, to avoid needing to deal with this old
code.

Boards which want EFI_LOADER should migrate to driver model first.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
diff --git a/lib/efi_driver/Makefile b/lib/efi_driver/Makefile
index 83baa1c..f2b6c05 100644
--- a/lib/efi_driver/Makefile
+++ b/lib/efi_driver/Makefile
@@ -6,6 +6,6 @@
 # object inclusion implicitly depends on it
 
 obj-y += efi_uclass.o
-ifeq ($(CONFIG_BLK)$(CONFIG_PARTITIONS),yy)
+ifeq ($(CONFIG_PARTITIONS),y)
 obj-y += efi_block_device.o
 endif