efi_loader: handle EFI_VARIABLE_ENHANCED_AUTHENTICATED_ACCESS

We don't yet support EFI_VARIABLE_ENHANCED_AUTHENTICATED_ACCESS for file
based variables, but we should pass it to TEE based variable stores.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
diff --git a/lib/efi_loader/efi_variable.c b/lib/efi_loader/efi_variable.c
index b2f8ebd..6fe3792 100644
--- a/lib/efi_loader/efi_variable.c
+++ b/lib/efi_loader/efi_variable.c
@@ -235,8 +235,12 @@
 	if (data_size && !data)
 		return EFI_INVALID_PARAMETER;
 
-	/* EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS is deprecated */
-	if (attributes & EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS)
+	/*
+	 * EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS is deprecated.
+	 * We don't support EFI_VARIABLE_ENHANCED_AUTHENTICATED_ACCESS.
+	 */
+	if (attributes & (EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS | \
+			  EFI_VARIABLE_ENHANCED_AUTHENTICATED_ACCESS))
 		return EFI_UNSUPPORTED;
 
 	/* Make sure if runtime bit is set, boot service bit is set also */