staging: bcm: Replace <asm/uaccess.h> by <linux/uaccess.h>

This patch fixes the checkpatch warning to include <linux/uaccess.h> instead
of <asm/uaccess.h>.
Signed-off-by: Ashley Smith <ashley@eclipso.ch>
Signed-off-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>

drivers/staging/bcm/headers.h

@@ -34,7 +34,7 @@
 #include <linux/tcp.h>
 #include <linux/udp.h>
 #include <linux/usb.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
 #include <net/ip.h>
 
 #include "Typedefs.h"