Use __LP64__ instead of __LP32__ in sched.h

Gcc defines only __LP64__ so testing __LP32__ will always be false.

Bug: 14881256
Change-Id: Ic63c1d562be09c3eb4b9e17c9e5ef2d9e404db80
diff --git a/libc/include/sched.h b/libc/include/sched.h
index 68115bb..e43b6cc 100644
--- a/libc/include/sched.h
+++ b/libc/include/sched.h
@@ -59,10 +59,10 @@
 extern int sched_getcpu(void);
 extern int setns(int, int);
 
-#ifdef __LP32__
-#define CPU_SETSIZE 32
-#else
+#ifdef __LP64__
 #define CPU_SETSIZE 1024
+#else
+#define CPU_SETSIZE 32
 #endif
 
 #define __CPU_BITTYPE  unsigned long int  /* mandated by the kernel  */