staging: rtl8723bs: remove assignment in condition in os_dep/ioctl_cfg80211.c

staging: rtl8723bs: remove assignment in condition in os_dep/ioctl_cfg80211.c

fix the following checkpatch warning:

ERROR: do not use assignment in if condition
1440: FILE: drivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c:1440:
+		if ((wps_ie = rtw_get_wps_ie(buf, len, NULL, &wps_ielen)))
--
ERROR: do not use assignment in if condition
2465: FILE: drivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c:2465:
+		if ((pmgntframe = alloc_mgtxmitframe(pxmitpriv)) == NULL)
--
ERROR: do not use assignment in if condition
2937: FILE: drivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c:2937:
+	if ((pmgntframe = alloc_mgtxmitframe(pxmitpriv)) == NULL) {
--
ERROR: do not use assignment in if condition
3335: FILE: drivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c:3335:
+	if (!(ndev = wdev_to_ndev(wdev)))

Signed-off-by: Fabio Aiuto <fabioaiuto83@gmail.com>
Link: https://lore.kernel.org/r/cc687c2ff614da3e110addd1c5cd610e3356cbd7.1616600897.git.fabioaiuto83@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>