tools/power turbostat: do not hard-code 25MHz crystal on SKX

Some SKX use a 24 MHz crystal, so do not hard code 25 MHz.

Also, SKX crystal is not exact, because SKX uses an EMI reduction
circuit that costs a fraction of a percent.
Signed-off-by: NLen Brown <len.brown@intel.com>

tools/power/x86/turbostat/turbostat.c

@@ -4261,7 +4261,6 @@ void process_cpuid()
 				case INTEL_FAM6_KABYLAKE_DESKTOP:	/* KBL */
 					crystal_hz = 24000000;	/* 24.0 MHz */
 					break;
-				case INTEL_FAM6_SKYLAKE_X:	/* SKX */
 				case INTEL_FAM6_ATOM_DENVERTON:	/* DNV */
 					crystal_hz = 25000000;	/* 25.0 MHz */
 					break;