efi: Rearrange the Kconfig for CMD_BOOTEFI_BOOTMGR

The command should not be used to enable library functionality. Add a
new BOOTEFI_BOOTMGR Kconfig for that. Adjust the conditions so that the
same code is built.

Signed-off-by: Simon Glass <sjg@chromium.org>
Suggested-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
diff --git a/lib/efi_loader/Kconfig b/lib/efi_loader/Kconfig
index 4ccd26f..547dfd7 100644
--- a/lib/efi_loader/Kconfig
+++ b/lib/efi_loader/Kconfig
@@ -32,14 +32,14 @@
 
 if EFI_LOADER
 
-config CMD_BOOTEFI_BOOTMGR
+config BOOTEFI_BOOTMGR
 	bool "UEFI Boot Manager"
 	default y
 	select BOOTMETH_GLOBAL if BOOTSTD
 	help
 	  Select this option if you want to select the UEFI binary to be booted
-	  via UEFI variables Boot####, BootOrder, and BootNext. This enables the
-	  'bootefi bootmgr' command.
+	  via UEFI variables Boot####, BootOrder, and BootNext. You should also
+	  normally enable CMD_BOOTEFI_BOOTMGR so that the command is available.
 
 choice
 	prompt "Store for non-volatile UEFI variables"