qcacld-3.0: Remove unused SPECTRAL_USE_NETLINK_SOCKETS macro
Kbuild currently passes the macro SPECTRAL_USE_NETLINK_SOCKETS to the
compiler. However this macro is now obsolete, so remove it.
Change-Id: Id88028cceddcaaf8f35c708451fa5bf21c4695dd
CRs-Fixed: 2220919