CPUFREQ: Loongson2: drop set_cpus_allowed_ptr()

It is pure mystery to me why we need to be on a specific CPU while
looking up a value in an array.
My best shot at this is that before commit d4019f0a92ab ("cpufreq: move
freq change notifications to cpufreq core") it was required to invoke
cpufreq_notify_transition() on a special CPU.

Since it looks like a waste, remove it.

Signed-off-by: Sebastian Andrzej Siewior <[e-mail]>
Acked-by: Viresh Kumar <[e-mail]>
Cc: Rafael J. Wysocki <[e-mail]>
Cc: [e-mail]
Cc: [e-mail]
Cc: [e-mail]
Patchwork: https://patchwork.linux-mips.org/patch/15888/
Signed-off-by: Ralf Baechle <[e-mail]>

drivers/cpufreq/loongson2_cpufreq.c

···
 static int loongson2_cpufreq_target(struct cpufreq_policy *policy,
 				     unsigned int index)
 {
-	unsigned int cpu = policy->cpu;
-	cpumask_t cpus_allowed;
 	unsigned int freq;
-
-	cpus_allowed = current->cpus_allowed;
-	set_cpus_allowed_ptr(current, cpumask_of(cpu));
 
 	freq =
 	    ((cpu_clock_freq / 1000) *
 	     loongson2_clockmod_table[index].driver_data) / 8;
-
-	set_cpus_allowed_ptr(current, &cpus_allowed);
 
 	/* setting the cpu frequency */
 	clk_set_rate(policy->clk, freq * 1000);