qcacld-3.0: Send mgmt frame with NULL channel

It won't send mgmt frame with NULL channel information currently,
which is different to other branches. Add this change because up layer
pass NULL channel information when tx mgmt frame in some platform.

Change-Id: I689d64789187fe0df03ed57ef0ff10c5157aeeb6
CRs-Fixed: 2459485
2 files changed