RDMA/irdma: Take a lock before moving SRQ tail in poll_cq

Need to take an SRQ lock in poll_cq before moving SRQ tail.

Change-Id: I36b66fa5ae26faa48f5ff5b040b99dd5c8a75b7f
Signed-off-by: Jay Bhat <jay.bhat@intel.com>
Reviewed-by: Jacob Moroni <jmoroni@google.com>
Signed-off-by: Tatyana Nikolova <tatyana.e.nikolova@intel.com>
Link: https://patch.msgid.link/20251031021726.1003-7-tatyana.e.nikolova@intel.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Reviewed-on: https://cos-review.googlesource.com/c/third_party/kernel/+/124300
Reviewed-by: Robert Kolchmeyer <rkolchmeyer@google.com>
Tested-by: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com>