platform/x86/intel-uncore-freq: Get rid of uncore_read_freq driver API

platform/x86/intel-uncore-freq: Get rid of uncore_read_freq driver API

Get rid of uncore_read_freq driver API. Instead, add a new entry to the
enumerated read interface and use this.

No functional change intended.

Signed-off-by: Tero Kristo <tero.kristo@linux.intel.com>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Link: https://lore.kernel.org/r/20240617060708.892981-6-tero.kristo@linux.intel.com
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>