5255 uts shouldn't open-code ISP2

*** 2136,2146 ****
           * Firmware needs the big buff size as a power of 2.  Lie and
           * tell him the buffer is larger, because we only use 1
           * buffer/pkt, and the mtu will prevent overruns
           */
          big_pow2 = myri10ge_mtu + MXGEFW_PAD;
!         while ((big_pow2 & (big_pow2 - 1)) != 0)
                  big_pow2++;
  
          /* now give firmware buffers sizes, and MTU */
          cmd.data0 = myri10ge_mtu;
          status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_MTU, &cmd);
--- 2136,2146 ----
           * Firmware needs the big buff size as a power of 2.  Lie and
           * tell him the buffer is larger, because we only use 1
           * buffer/pkt, and the mtu will prevent overruns
           */
          big_pow2 = myri10ge_mtu + MXGEFW_PAD;
!         while (!ISP2(big_pow2))
                  big_pow2++;
  
          /* now give firmware buffers sizes, and MTU */
          cmd.data0 = myri10ge_mtu;
          status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_MTU, &cmd);
*** 5435,5445 ****
           * slices. We give up on MSI-X if we can only get a single
           * vector.
           */
          while (mgp->num_slices > 1) {
                  /* make sure it is a power of two */
!                 while (mgp->num_slices & (mgp->num_slices - 1))
                          mgp->num_slices--;
                  if (mgp->num_slices == 1)
                          return (0);
  
                  status = myri10ge_add_intrs(mgp, 0);
--- 5435,5445 ----
           * slices. We give up on MSI-X if we can only get a single
           * vector.
           */
          while (mgp->num_slices > 1) {
                  /* make sure it is a power of two */
!                 while (!ISP2(mgp->num_slices))
                          mgp->num_slices--;
                  if (mgp->num_slices == 1)
                          return (0);
  
                  status = myri10ge_add_intrs(mgp, 0);