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>
diff --git a/lib/efi_loader/efi_console.c b/lib/efi_loader/efi_console.c
index 1d52753..3fd0d2f 100644
--- a/lib/efi_loader/efi_console.c
+++ b/lib/efi_loader/efi_console.c
@@ -335,6 +335,8 @@
 	EFI_ENTRY("%p", this);
 
 	printf(ESC"[2J");
+	efi_con_mode.cursor_column = 0;
+	efi_con_mode.cursor_row = 0;
 
 	return EFI_EXIT(EFI_SUCCESS);
 }