platform/x86/intel-uncore-freq: Get rid of magic values

platform/x86/intel-uncore-freq: Get rid of magic values

Get rid of any magic bitmasks from the code. Define proper macros for
these, and use the bitfield operations to access them.

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/20240617060708.892981-3-tero.kristo@linux.intel.com
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>