eina_thread: Don't ensure affinity core is lower than number of cpus

CPUs can be turned off after boot leading to a sparse mapping of core ids.

For example, if I turn off the first four cores on an exynos 5422 (these
are the low speed cores) then the high speed cores are still numbered 4-7
but there are only 4 cores present.

In that situation using affinity_core % num_cpus will prevent ever being
able to set affinity at all.

Just remove the pointless check and let the user set whatever core id they
want.

src/lib/eina/eina_thread.c

@@ -70,12 +70,9 @@ _eina_thread_create(Eina_Thread *t, int affinity, void *(*func)(void *data), voi
      {
 #ifdef EINA_HAVE_PTHREAD_AFFINITY
         cpu_set_t cpu;
-        int cpunum;
-
-        cpunum = eina_cpu_count();
 
         CPU_ZERO(&cpu);
-        CPU_SET(affinity % cpunum, &cpu);
+        CPU_SET(affinity, &cpu);
         pthread_attr_setaffinity_np(&attr, sizeof(cpu), &cpu);
 #endif
      }