staging: brcm80211: remove mips specific include from dma.c

The include <asm/addrspace.h> has been removed as it is not
needed. None of the definitions from it are used in the source
file.

Tested on BCM63281.
Reviewed-by: NHenry Ptasinski <henryp@broadcom.com>
Reviewed-by: NPieter-Paul Giesberts <pieterpg@broadcom.com>
Tested-by: NJonas Gorski <jonas.gorski@gmail.com>
Signed-off-by: NArend van Spriel <arend@broadcom.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

drivers/staging/brcm80211/brcmsmac/dma.c

@@ -18,10 +18,6 @@
 #include <linux/delay.h>
 #include <linux/pci.h>
 
-#if defined(__mips__)
-#include <asm/addrspace.h>
-#endif
-
 #include <brcmu_utils.h>
 #include <aiutils.h>
 #include "types.h"