staging: brcm80211: fixed build issue for big endian platforms

Driver now builds for big endian mips platform, possibly also for other
big endian platforms. A change was made to the R_REG and W_REG macro's.
These macro's perform an xor (^) operation for endianess swap purposes.
Gcc complained because an xor operation is not allowed on a pointer type.
Fixed this by casting the pointer to an unsigned long.
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/brcm80211/brcmsmac/dma.h

@@ -17,6 +17,7 @@
 #ifndef	_BRCM_DMA_H_
 #define	_BRCM_DMA_H_
 
+#include <linux/delay.h>
 #include "types.h"		/* forward structure declarations */
 
 /* DMA structure:

drivers/staging/brcm80211/brcmsmac/types.h

@@ -305,11 +305,11 @@ do {						\
 		switch (sizeof(*(r))) { \
 		case sizeof(u8): \
 			__osl_v = \
-			readb((u8 *)((r)^3)); \
+			readb((u8 *)((unsigned long)(r)^3)); \
 			break; \
 		case sizeof(u16): \
 			__osl_v = \
-			readw((u16 *)((r)^2)); \
+			readw((u16 *)((unsigned long)(r)^2)); \
 			break; \
 		case sizeof(u32): \
 			__osl_v = readl((u32 *)(r)); \
@@ -322,10 +322,10 @@ do {						\
 		switch (sizeof(*(r))) { \
 		case sizeof(u8):	\
 			writeb((u8)(v), \
-			(u8 *)((r)^3)); break; \
+			(u8 *)((unsigned long)(r)^3)); break; \
 		case sizeof(u16):	\
 			writew((u16)(v), \
-			(u16 *)((r)^2)); break; \
+			(u16 *)((unsigned long)(r)^2)); break; \
 		case sizeof(u32):	\
 			writel((u32)(v), \
 			(u32 *)(r)); break; \