efi_loader: require CONFIG_BLK

The move to driver model should by now be completed. To be able to remove
pre-driver model code from our block IO code require CONFIG_BLK=y for UEFI
support.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>

lib/efi_loader/Kconfig

@@ -10,6 +10,7 @@ config EFI_LOADER
 	depends on !EFI_STUB || !X86_64 || EFI_STUB_64BIT
 	# We need EFI_STUB_32BIT to be set on x86_32 with EFI_STUB
 	depends on !EFI_STUB || !X86 || X86_64 || EFI_STUB_32BIT
+	depends on BLK
 	default y if !ARM || SYS_CPU = armv7 || SYS_CPU = armv8
 	select LIB_UUID
 	select PARTITION_UUIDS