efi_loader: avoid EFI_CALL() when draining console

Use internal function.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
diff --git a/lib/efi_loader/efi_console.c b/lib/efi_loader/efi_console.c
index 6d4784e..ab83f8b 100644
--- a/lib/efi_loader/efi_console.c
+++ b/lib/efi_loader/efi_console.c
@@ -1359,9 +1359,7 @@
 	       ANSI_CLEAR_LINE_TO_END
 	       ANSI_CURSOR_SHOW, row, col);
 
-	ret = EFI_CALL(cin->reset(cin, false));
-	if (ret != EFI_SUCCESS)
-		return ret;
+	efi_cin_empty_buffer();
 
 	for (;;) {
 		do {