efi_loader: rename BOOTEFI_BOOTMGR to EFI_BOOTMGR

At this point, EFI boot manager interfaces is fully independent from
bootefi command. So just rename the configuration parameter.

Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/cmd/Kconfig b/cmd/Kconfig
index 150fa37..62d2ae3 100644
--- a/cmd/Kconfig
+++ b/cmd/Kconfig
@@ -395,7 +395,7 @@
 
 config CMD_BOOTEFI_BOOTMGR
 	bool "UEFI Boot Manager command"
-	depends on BOOTEFI_BOOTMGR
+	depends on EFI_BOOTMGR
 	default y
 	help
 	  Select this option to enable the 'bootmgr' subcommand of 'bootefi'.
@@ -2153,7 +2153,7 @@
 config CMD_EFICONFIG
 	bool "eficonfig - provide menu-driven uefi variables maintenance interface"
 	default y if !HAS_BOARD_SIZE_LIMIT
-	depends on BOOTEFI_BOOTMGR
+	depends on EFI_BOOTMGR
 	select MENU
 	help
 	  Enable the 'eficonfig' command which provides the menu-driven UEFI