drivers: qcom: update RPMH to allow RPMH_AWAKE_STATE requests

Allow RPMH to also send awake requests (active + wake) to the mailbox.
The mailbox will only entertain the request if there are no AMC TCSes
available to send active votes.

Change-Id: Id04cc2120cc9bd46212815766b52639f7948efbf
Signed-off-by: Lina Iyer <ilina@codeaurora.org>