wifi: ath11k: generate rx and tx mcs maps for supported HE mcs

Generate rx and tx mcs maps in ath11k_mac_set_hemcsmap() and set them
in supported mcs/nss for HE capabilities.

Tested-on: IPQ8074 hw2.0 AHB WLAN.HK.2.4.0.1-00356-QCAHKSWPL_SILICONZ-1

Signed-off-by: Muna Sinada <quic_msinada@quicinc.com>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://lore.kernel.org/r/1666128501-12364-5-git-send-email-quic_msinada@quicinc.com