qcacmn: Remove skip HP update logic during tx pause flag is set

Currently HP update can skip for few packets if the system suspend
is happening in parallel with tx. This could lead to SMMU fault if
the skipped HP update goes after tx desc force free.

Remove the tx pause check in HP updates and have the check before
calling dp_tx_send in case of intra-bss forward case. No special
handling is needed for non intra-bss case as we don't expect packets
from network stack after suspend.

Change-Id: Id4f2cefcc0a14e7c16438b9bda5cb1d55eb05050
CRs-Fixed: 3327818