qcacld-3.0: Add ini to enable/disable vht mcs 10 and 11 support

Currently there is no ini to enable/disable vht mac 10, 11
and this feature is completely based on FW capability.

Based on current requirement add support to enable/disable
vht mcs 10/11 feature from ini.

CRs-Fixed: 2861854
Change-Id: I350daea8a2f81bfeac25ccdda026d1a5d1c133e3