staging/go7007: Fix compilation by re-adding the missing s2250-loader.h

As pointed by Stefan Lippers-Hollmann <s.L-H@gmx.de>,

Commit:	fd9a40da broke s2250
compilation.

This patch re-adds the missing s2250-loader.h
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

drivers/staging/go7007/s2250-loader.h

+/*
+ * Copyright (C) 2005-2006 Micronas USA Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License (Version 2) as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
+ */
+
+#ifndef _S2250_LOADER_H_
+#define _S2250_LOADER_H_
+
+extern int s2250loader_init(void);
+extern void s2250loader_cleanup(void);
+
+#endif