Do not force POSIX mutexes on FreeBSD

This relates to bug 2462
See comments on bug 2744

Signed-off-by: Slávek Banko <slavek.banko@axis.cz>

src/tools/qmutex_unix.cpp

@@ -45,8 +45,8 @@
 typedef pthread_mutex_t     Q_MUTEX_T;
 
 // POSIX threads mutex types
-#if ((defined(PTHREAD_MUTEX_RECURSIVE) && defined(PTHREAD_MUTEX_DEFAULT)) || \
-     defined(Q_OS_FREEBSD)) && !defined(Q_OS_UNIXWARE) && !defined(Q_OS_SOLARIS) && \
+#if (defined(PTHREAD_MUTEX_RECURSIVE) && defined(PTHREAD_MUTEX_DEFAULT)) && \
+    !defined(Q_OS_UNIXWARE) && !defined(Q_OS_SOLARIS) && \
     !defined(Q_OS_MAC)
 // POSIX 1003.1c-1995 - We love this OS
 #  define Q_MUTEX_SET_TYPE(a, b) pthread_mutexattr_settype((a), (b))