efi_loader: fix EFI entry counting

`bootefi selftest` fails on qemu-x86_defconfig if efi_selftest() is not
invoked using EFI_CALL().

Likewise we call the entry point of EFI payloads with
EFI_CALL(efi_start_image()).

entry_count indicates if we are in U-Boot (1) or in EFI payload code (0).
As we start in U-Boot code the initial value has to be 1.
Signed-off-by: NHeinrich Schuchardt <xypron.glpk@gmx.de>

cmd/bootefi.c

@@ -437,7 +437,7 @@ static int do_bootefi(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 			return CMD_RET_FAILURE;
 
 		/* Execute the test */
-		r = efi_selftest(&image_obj->header, &systab);
+		r = EFI_CALL(efi_selftest(&image_obj->header, &systab));
 		bootefi_run_finish(image_obj, loaded_image_info);
 		return r != EFI_SUCCESS;
 	} else

lib/efi_loader/efi_boottime.c

@@ -44,7 +44,8 @@ static bool efi_is_direct_boot = true;
 static volatile void *efi_gd, *app_gd;
 #endif
 
-static int entry_count;
+/* 1 if inside U-Boot code, 0 if inside EFI payload code */
+static int entry_count = 1;
 static int nesting_level;
 /* GUID of the device tree table */
 const efi_guid_t efi_guid_fdt = EFI_FDT_GUID;