efi_selftest: enable 'bootefi hello'

In our Python tests we want to run 'bootefi hello'. Enable it by default
when compiling with CMD_BOOTEFI_SELFTEST.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
diff --git a/cmd/Kconfig b/cmd/Kconfig
index 202c7cc..bfe6c16 100644
--- a/cmd/Kconfig
+++ b/cmd/Kconfig
@@ -378,6 +378,7 @@
 config CMD_BOOTEFI_HELLO
 	bool "Allow booting a standard EFI hello world for testing"
 	depends on CMD_BOOTEFI_HELLO_COMPILE
+	default y if CMD_BOOTEFI_SELFTEST
 	help
 	  This adds a standard EFI hello world application to U-Boot so that
 	  it can be used with the 'bootefi hello' command. This is useful