qcacld-3.0: Add pointer sanity check for mac_phy_cap

Add pointer sanity check for mac_phy_cap in wma_update_hw_mode_list
as target_psoc_get_mac_phy_cap may return Null for mac_phy_cap

Change-Id: Id45b77fa4daf3df0680ee247355dbc87e0402dd9
CRs-Fixed: 2706156
1 file changed