mx6sabresd: Fix guard file symbol

Remove the "Q" from the file guard symbol, so that it matches
the file name.

Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>

include/configs/mx6sabresd.h

@@ -6,8 +6,8 @@
  * SPDX-License-Identifier:	GPL-2.0+
  */
 
-#ifndef __MX6QSABRESD_CONFIG_H
-#define __MX6QSABRESD_CONFIG_H
+#ifndef __MX6SABRESD_CONFIG_H
+#define __MX6SABRESD_CONFIG_H
 
 #ifdef CONFIG_SPL
 #include "imx6_spl.h"
@@ -71,4 +71,4 @@
 #define CONFIG_USB_MAX_CONTROLLER_COUNT	1 /* Enabled USB controller number */
 #endif
 
-#endif                         /* __MX6QSABRESD_CONFIG_H */
+#endif                         /* __MX6SABRESD_CONFIG_H */