msm: ipa3: embellish access control policy algorithm

Altered access control policy rule search such that rules further down
the policy table will be used. This mitigates register offset to rule
ambiguity.

Also now using kernel defined reads and writes instead of local ones.

Change-Id: Icbd94d41b565ad1af07c420d2ff25d9742db1f15
Signed-off-by: Perry Randise <prandise@codeaurora.org>
Signed-off-by: Ghanim Fodi <gfodi@codeaurora.org>