qcacld-3.0: Remove sap_channel_matrix_check() prototype
The implementation of sap_channel_matrix_check() is no longer part of
the driver, but the prototype is still present. Since the prototype is
obsolete, remove it.
Change-Id: I689c4360776a2b46d723c48dd5bb8a61da5c95cd
CRs-Fixed: 2375521