Fix build for PPC970 on FreeBSD pt.2

FreeBSD needs those macros too.

Author: pkubaj

param.h

@@ -1999,7 +1999,7 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #define ZGEMM_DEFAULT_UNROLL_M 2
 #define ZGEMM_DEFAULT_UNROLL_N 2
 
-#if defined(OS_LINUX) || defined(OS_DARWIN)
+#if defined(OS_LINUX) || defined(OS_DARWIN) || defined(OS_FREEBSD)
 #if L2_SIZE == 1024976
 #define SGEMM_DEFAULT_P 320
 #define DGEMM_DEFAULT_P 256