qcacmn: Fill skb->priority only for macro ATH_RX_PRI_SAVE

skb->priority is needed only for ATH_RX_PRI_SAVE. This access can
be avoided in regular datapath by using skb->cb for faster access.

Change-Id: I5ef970fa45fa314db7e14284d898c98a59d8591e
1 file changed