msm: adsprpc: Allow kernel and static handle contexts

Currently if the active contexts exceeds limit, EDQUOT is returned.
Even kernel and static handle contexts returns failure when limit is
already reached. Allow kernel and static handle contexts even if the
limit is already reached.

Change-Id: Ib3c4cf45ea2369e671e0fd6f284f86a2bbde8fef
Signed-off-by: Himateja Reddy <hmreddy@codeaurora.org>