Special frames like EAPOL should not be dropped as it would cause
failure in connection. To prevent the dropping of higher priority
special frames, reserve a set of descriptors from the tx descriptor
pool.
Check the regular soc or pdev limit for the allocating tx descriptors
for the regular packets and use the reserved set of descriptors
only for the special packets.
CRs-Fixed: 3331359
Change-Id: I15532fb5e325ba6ad997090008bda8c52707a05b
d148f093d2