Fix jemalloc build for PowerPC
Note: mandatory check (NEED_CHECK) was skipped
* Hyper-threaded CPUs may need a special instruction inside spin loops in
* order to yield to another virtual CPU.
*/
-#if defined(__arm__) || defined(__ARM_NEON) || defined(__aarch64__)
+#if defined(__arm__) || defined(__ARM_NEON) || defined(__aarch64__) || defined(__ppc__)
#define CPU_SPINWAIT
#else
#define CPU_SPINWAIT __asm__ volatile("pause")
