efi_loader: eliminate EFI_CALL() in nvedit_efi.c

Reduce the code size by avoiding using the external UEFI API and using our
internal functions instead.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
diff --git a/cmd/nvedit_efi.c b/cmd/nvedit_efi.c
index 676bbda..710d923 100644
--- a/cmd/nvedit_efi.c
+++ b/cmd/nvedit_efi.c
@@ -187,8 +187,8 @@
 	var_name16[0] = 0;
 	for (;;) {
 		size = buf_size;
-		ret = EFI_CALL(efi_get_next_variable_name(&size, var_name16,
-							  &guid));
+		ret = efi_get_next_variable_name_int(&size, var_name16,
+						     &guid);
 		if (ret == EFI_NOT_FOUND)
 			break;
 		if (ret == EFI_BUFFER_TOO_SMALL) {
@@ -199,9 +199,8 @@
 				return CMD_RET_FAILURE;
 			}
 			var_name16 = p;
-			ret = EFI_CALL(efi_get_next_variable_name(&size,
-								  var_name16,
-								  &guid));
+			ret = efi_get_next_variable_name_int(&size, var_name16,
+							     &guid);
 		}
 		if (ret != EFI_SUCCESS) {
 			free(var_name16);