deployment: support all revisions of the PERC RAID controller

On Dell PowerEdge R310 servers we have the PERC H700, on the next
generation model R320 we have PERC H710.  Don't be too picky
about the whitelist and just check for "PERC" in the model
information and "DELL" as vendor.

From: Michael Prokop <mprokop@sipwise.com>

deployment.sh

@@ -676,7 +676,8 @@ check_for_supported_disk() {
     return 0
   fi
 
-  if grep -q 'PERC H700' /sys/block/${DISK}/device/model && \
+  # PERC H700, PERC H710,...
+  if grep -q 'PERC' /sys/block/${DISK}/device/model && \
     grep -q "DELL" /sys/block/${DISK}/device/vendor ; then
     return 0
   fi