arm/imx/iomux-mx21: unify style

- use __MACH_IOMUX_MX21_H__ as header protector analogous to
  <mach/mx...h>
- use tabs for indention
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>

arch/arm/plat-mxc/include/mach/iomux-mx21.h

 /*
-* Copyright (C) 2009 by Holger Schurig <hs4233@mail.mn-solutions.de>
-*
-* This program is free software; you can redistribute it and/or
-* modify it under the terms of the GNU General Public License
-* as published by the Free Software Foundation; either version 2
-* of the License, or (at your option) any later version.
-* 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., 51 Franklin Street, Fifth Floor, Boston,
-* MA 02110-1301, USA.
-*/
-
-#ifndef _MXC_IOMUX_MX21_H
-#define _MXC_IOMUX_MX21_H
+ * Copyright (C) 2009 by Holger Schurig <hs4233@mail.mn-solutions.de>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ * 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., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301, USA.
+ */
+#ifndef __MACH_IOMUX_MX21_H__
+#define __MACH_IOMUX_MX21_H__
 
 #ifndef GPIO_PORTA
 #error Please include mach/iomux.h
 #endif
 
-
 /* Primary GPIO pin functions */
 
 #define PB22_PF_USBH1_BYP	(GPIO_PORTB | GPIO_PF | 22)
@@ -122,5 +120,4 @@
 #define PF13_AOUT_PC_CD2	(GPIO_PORTF | GPIO_AOUT | GPIO_IN | 13)
 #define PF14_AOUT_PC_CD1	(GPIO_PORTF | GPIO_AOUT | GPIO_IN | 14)
 
-
-#endif
+#endif /* ifndef __MACH_IOMUX_MX21_H__ */