cpufreq: intel_pstate: Eliminate some code duplication

To eliminate some code duplication from the intel_pstate driver,
move the core_get_val() function body to a new function called
get_perf_ctl_val() and make both core_get_val() and atom_get_val()
invoke it to carry out the same computation.

No intentional functional impact.

Signed-off-by: Rafael J. Wysocki <[e-mail]>
Acked-by: Srinivas Pandruvada <[e-mail]>
Link: https://patch.msgid.link/[e-mail]

drivers/cpufreq/intel_pstate.c

···
 	intel_pstate_update_epp_defaults(cpudata);
 }
 
+static u64 get_perf_ctl_val(int pstate)
+{
+	u64 val;
+
+	val = (u64)pstate << 8;
+	if (READ_ONCE(global.no_turbo) && !READ_ONCE(global.turbo_disabled) &&
+	    cpu_feature_enabled(X86_FEATURE_IDA))
+		val |= (u64)1 << 32;
+
+	return val;
+}
+
 static int atom_get_min_pstate(int not_used)
 {
 	u64 value;
···
 
 static u64 atom_get_val(struct cpudata *cpudata, int pstate)
 {
-	u64 val;
+	u64 val = get_perf_ctl_val(pstate);
 	int32_t vid_fp;
 	u32 vid;
-
-	val = (u64)pstate << 8;
-	if (READ_ONCE(global.no_turbo) && !READ_ONCE(global.turbo_disabled) &&
-	    cpu_feature_enabled(X86_FEATURE_IDA))
-		val |= (u64)1 << 32;
 
 	vid_fp = cpudata->vid.min + mul_fp(
 		int_tofp(pstate - cpudata->pstate.min_pstate),
···
 
 static u64 core_get_val(struct cpudata *cpudata, int pstate)
 {
-	u64 val;
-
-	val = (u64)pstate << 8;
-	if (READ_ONCE(global.no_turbo) && !READ_ONCE(global.turbo_disabled) &&
-	    cpu_feature_enabled(X86_FEATURE_IDA))
-		val |= (u64)1 << 32;
-
-	return val;
+	return get_perf_ctl_val(pstate);
 }
 
 static int knl_get_aperf_mperf_shift(void)