Exclude altivec code paths if the compiler does not support them

kernel/power/cdot.c

@@ -23,6 +23,9 @@ CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
 USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *****************************************************************************/
+#if !defined(__VEC__) || !defined(__ALTIVEC__)
+#include "../arm/zdot.c"
+#else
 
 #include "common.h"
 #ifndef HAVE_KERNEL_8
@@ -168,3 +171,4 @@ OPENBLAS_COMPLEX_FLOAT CNAME(BLASLONG n, FLOAT *x, BLASLONG inc_x, FLOAT *y, BLA
     return (result);
 
 }
+#endif