[VE][compiler-rt] Correct location of VE support in clear_cache function, NFC

[brad]

Summary

Looks like when the VE support was added it was added a few lines below where it should have been.

compiler-rt/lib/builtins/clear_cache.c

#elif defined(__riscv) && defined(__linux__)
   assert(start_reg == 0 && "Cache flush syscall failed.");
 #elif defined(__riscv) && defined(__OpenBSD__)
   struct riscv_sync_icache_args arg;
 
   arg.addr = (uintptr_t)start;
   arg.len = (uintptr_t)end - (uintptr_t)start;
 
   sysarch(RISCV_SYNC_ICACHE, &arg);
+#elif defined(__ve__)
+  __asm__ volatile("fencec 2");
 #else
 #if __APPLE__
   // On Darwin, sys_icache_invalidate() provides this functionality
   sys_icache_invalidate(start, end - start);
-#elif defined(__ve__)
-  __asm__ volatile("fencec 2");
 #else
   compilerrt_abort();
 #endif
 #endif
 }