efi_loader: EFI_DEVICE_PATH_UTILITIES_PROTOCOL configurable

Allow the EFI_DEVICE_PATH_UTILITIES_PROTOCOL to be disabled via
configuration.

On systems that are very tight on U-Boot image size we may want to disable
the protocol. As it is required to run the UEFI Shell enable it by default.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
diff --git a/lib/efi_loader/Kconfig b/lib/efi_loader/Kconfig
index 227cfa5..038cdc9 100644
--- a/lib/efi_loader/Kconfig
+++ b/lib/efi_loader/Kconfig
@@ -208,6 +208,13 @@
 	  The device path to text protocol converts device nodes and paths to
 	  human readable strings.
 
+config EFI_DEVICE_PATH_UTIL
+	bool "Device path utilities protocol"
+	default y
+	help
+	  The device path utilities protocol creates and manipulates device
+	  paths and device nodes. It is required to run the EFI Shell.
+
 config EFI_DT_FIXUP
 	bool "Device tree fixup protocol"
 	depends on !GENERATE_ACPI_TABLE