staging: tidspbridge: no need for custom NULL

kernel has it's own NULL define, we dont need to introduce our own
custom NULL type!
Signed-off-by: NNishanth Menon <nm@ti.com>
Reviewed-by: NFelipe Contreras <felipe.contreras@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

drivers/staging/tidspbridge/dynload/header.h

@@ -14,10 +14,6 @@
  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  */
 
-#ifndef NULL
-#define NULL 0
-#endif
-
 #include <linux/string.h>
 #define DL_STRCMP  strcmp
 

drivers/staging/tidspbridge/hw/GlobalTypes.h

@@ -19,15 +19,6 @@
 #ifndef _GLOBALTYPES_H
 #define _GLOBALTYPES_H
 
-/*
- * Definition: NULL
- *
- * DESCRIPTION:  Invalid pointer
- */
-#ifndef NULL
-#define NULL	(void *)0
-#endif
-
 /*
  * Definition: RET_CODE_BASE
  *

drivers/staging/tidspbridge/include/dspbridge/dbtype.h

@@ -41,14 +41,6 @@
 #define CONST   const
 #endif
 
-/*===========================================================================*/
-/*  NULL    (Definition is language specific) */
-/*===========================================================================*/
-
-#ifndef NULL
-#define NULL    ((void *)0)	/* Null pointer. */
-#endif
-
 /*===========================================================================*/
 /*  NULL character   (normally used for string termination) */
 /*===========================================================================*/

drivers/staging/tidspbridge/include/dspbridge/std.h

@@ -74,10 +74,6 @@
 
 typedef s32(*fxn) (void);	/* generic function type */
 
-#ifndef NULL
-#define NULL 0
-#endif
-
 /*
  * These macros are used to cast 'Arg' types to 's32' or 'Ptr'.
  * These macros were added for the 55x since Arg is not the same