efi_loader: clear screen has to reset cursor position

After clearing the screen the cursor position is row 0, column 0.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Alexander Graf <agraf@suse.de>

lib/efi_loader/efi_console.c

@@ -335,6 +335,8 @@ static efi_status_t EFIAPI efi_cout_clear_screen(
 	EFI_ENTRY("%p", this);
 
 	printf(ESC"[2J");
+	efi_con_mode.cursor_column = 0;
+	efi_con_mode.cursor_row = 0;
 
 	return EFI_EXIT(EFI_SUCCESS);
 }