platform: qcom-geni-se : Remove ssr-enable flag from individual driver

Remove ssr-enable flag from each SE protocol driver and depends on
common driver DTSI flag for SSR UP/DOWN notification. Also change the
SSR forced PM callbacks from each protocol return type to void.

Change-Id: Ic885c493cae204ec73c999a09613f519e0a47bbf
Signed-off-by: Ashish Kori <akori@codeaurora.org>