net: qrtr: Add permission rules for QTI targets

Give control port access to processes that have root user priveleges,
AID_VENDOR_QRTR user priveleges, or NET_ADMIN capabilities.

Remove the need for SYS_ADMIN priveleges because they will not be
granted on any QTI targets.

This change squashes the following commits from msm-4.14:
  commit 17da4da93c96 ("qrtr: Allow net bind service capabilities")
  commit 56faadfd27b4 ("qrtr: Fix NET_BIND_SERVICE logic")
  commit 82ea58d60c46 ("net: qrtr: Allow control port access to
                        AID_VENDOR_QRTR")
  commit 9db4f5803ce1 ("net: qrtr: Allow Root guid process to bind")

In addition fix minor format issues.

Change-Id: I1441cbf53eb62880333a1031334a5331c1f54a77
Signed-off-by: Chris Lew <clew@codeaurora.org>