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/efidebug.c b/cmd/efidebug.c
index aa85237..a3a7556 100644
--- a/cmd/efidebug.c
+++ b/cmd/efidebug.c
@@ -1414,7 +1414,7 @@
 }
 
 static struct cmd_tbl cmd_efidebug_test_sub[] = {
-#ifdef CONFIG_BOOTEFI_BOOTMGR
+#ifdef CONFIG_EFI_BOOTMGR
 	U_BOOT_CMD_MKENT(bootmgr, CONFIG_SYS_MAXARGS, 1, do_efi_test_bootmgr,
 			 "", ""),
 #endif
@@ -1608,7 +1608,7 @@
 	"  - show UEFI memory map\n"
 	"efidebug tables\n"
 	"  - show UEFI configuration tables\n"
-#ifdef CONFIG_BOOTEFI_BOOTMGR
+#ifdef CONFIG_EFI_BOOTMGR
 	"efidebug test bootmgr\n"
 	"  - run simple bootmgr for test\n"
 #endif