wifi: ath11k: Do not directly use scan_flags in struct scan_req_params

As discussed in [1] lets not use WMI_SCAN_XXX defines in combination with
scan_flags directly when setting scan params in struct scan_req_params but use
the underlying bitfield. This bitfield is then converted to WMI_SCAN_XXX when
filling the WMI command to send to the firmware.

[1] https://lore.kernel.org/all/871qae51wx.fsf@kernel.org/



Tested-on: QCN9074 PCI WLAN.HK.2.7.0.1-01744-QCAHKSWPL_SILICONZ-1

Signed-off-by: Nicolas Escande <nico.escande@gmail.com>
Acked-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://msgid.link/20240209113536.266822-2-nico.escande@gmail.com