efi_loader: Use directly version_string variable

Macro U_BOOT_VERSION_STRING is already stored in variable version_string.
So use directly this variable instead of storing U_BOOT_VERSION_STRING into
temporary variable.

Signed-off-by: Pali Rohár <pali@kernel.org>
[trini: This area was reworked since posted, what is here is now really
        inspired by the previous version, so drop Ilias' Acked-by]
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/lib/efi_loader/efi_tcg2.c b/lib/efi_loader/efi_tcg2.c
index cb48919..578b69e 100644
--- a/lib/efi_loader/efi_tcg2.c
+++ b/lib/efi_loader/efi_tcg2.c
@@ -1337,10 +1337,11 @@
  */
 static efi_status_t efi_append_scrtm_version(struct udevice *dev)
 {
-	u8 ver[] = U_BOOT_VERSION_STRING;
 	efi_status_t ret;
 
-	ret = tcg2_measure_event(dev, 0, EV_S_CRTM_VERSION, sizeof(ver), ver);
+	ret = tcg2_measure_event(dev, 0, EV_S_CRTM_VERSION,
+				 strlen(version_string) + 1,
+				 (u8 *)version_string);
 
 	return ret;
 }