drivers: qcom: rpmh-rsc: clear active mode configuration for waketcs

For RSCs that have sleep & wake TCS but no dedicated active TCS, wake
TCS can be re-purposed to send active requests. Once the active requests
are sent and response is received, the active mode configuration needs
to be cleared so that controller can use wake TCS for sending wake
requests in 'solver' state while executing low power modes.

Change-Id: I0d15c290db48d08158fdbff2cd91505563dc3fd5
Signed-off-by: Raju P.L.S.S.S.N <rplsssn@codeaurora.org>