staging: brcm80211: removed set_fs/get_fs/get_ds calls from brcmf_dev_ioctl()

brcmf_dev_ioctl() does not provide a user space buffer to
brcmf_netdev_ioctl_priv. Hence these calls are not necessary.
Reported-by: NJohannes Berg <johannes@sipsolutions.net>
Reviewed-by: NArend van Spriel <arend@broadcom.com>
Reviewed-by: NFranky Lin <frankyl@broadcom.com>
Signed-off-by: NFranky Lin <frankyl@broadcom.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

drivers/staging/brcm80211/brcmfmac/wl_cfg80211.c

@@ -251,7 +251,6 @@ static s32
 brcmf_dev_ioctl(struct net_device *dev, u32 cmd, void *arg, u32 len)
 {
 	struct brcmf_ioctl ioc;
-	mm_segment_t fs;
 	s32 err = 0;
 
 	memset(&ioc, 0, sizeof(ioc));
@@ -259,10 +258,7 @@ brcmf_dev_ioctl(struct net_device *dev, u32 cmd, void *arg, u32 len)
 	ioc.buf = arg;
 	ioc.len = len;
 
-	fs = get_fs();
-	set_fs(get_ds());
 	err = brcmf_netdev_ioctl_priv(dev, &ioc);
-	set_fs(fs);
 
 	return err;
 }