rename USE_NPTL to CONFIG_USE_NPTL

Signed-off-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
diff --git a/bsd-user/qemu.h b/bsd-user/qemu.h
index d411bbb..822a214 100644
--- a/bsd-user/qemu.h
+++ b/bsd-user/qemu.h
@@ -24,7 +24,7 @@
 #include "target_signal.h"
 #include "gdbstub.h"
 
-#if defined(USE_NPTL)
+#if defined(CONFIG_USE_NPTL)
 #define THREAD __thread
 #else
 #define THREAD
@@ -188,7 +188,7 @@
 void mmap_unlock(void);
 void cpu_list_lock(void);
 void cpu_list_unlock(void);
-#if defined(USE_NPTL)
+#if defined(CONFIG_USE_NPTL)
 void mmap_fork_start(void);
 void mmap_fork_end(int child);
 #endif
@@ -382,7 +382,7 @@
 #define unlock_user_struct(host_ptr, guest_addr, copy)          \
     unlock_user(host_ptr, guest_addr, (copy) ? sizeof(*host_ptr) : 0)
 
-#if defined(USE_NPTL)
+#if defined(CONFIG_USE_NPTL)
 #include <pthread.h>
 #endif