qcacld-3.0: Get the current chains in drv_cmd_get_antenna_mode

In the API drv_cmd_get_antenna_mode, the driver gets the
hdd_ctx->current_antenna_mode, which is pdev level, but
with the new feature of per vdev antenna mode, return the
num of chains for that particular vdev.

Change-Id: Ia8180592c34a29a7593943fc5e10c781682aac56
CRs-Fixed: 2347494
1 file changed