cmd: disable CMD_NVEDIT_EFI by default

The growth of the UEFI sub-system leads to build failures for systems with
strict limits on the U-Boot image size.

CMD_NVEDIT_EFI supports displaying and editing of UEFI variables. The
setting is not needed for booting. Disabling it by default reduces the
size of the U-Boot image by 2 KiB.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
diff --git a/cmd/Kconfig b/cmd/Kconfig
index 4e61565..8e55b34 100644
--- a/cmd/Kconfig
+++ b/cmd/Kconfig
@@ -531,7 +531,6 @@
 config CMD_NVEDIT_EFI
 	bool "env [set|print] -e - set/print UEFI variables"
 	depends on EFI_LOADER
-	default y
 	imply HEXDUMP
 	help
 	  UEFI variables are encoded as some form of U-Boot variables.