qcom-geni-se: Correct logic for bus BW vote if Bus driver not ready

Currently driver voting for bus bandwidth without checking for bus
driver registration. But during clks_off or resources_off() checking
for bus handle and exiting the function without removing added vote.

In this change removing checks in clks_off & resource_off functions
in common driver so that it will balance the list operations which
done as a part of clks_on and resources_on functions
and fix issues related list operations.

Change-Id: Ic0986c706bbd061bcef010a8cfb6e3e4e2e4ab7b
Signed-off-by: Chandana Kishori Chiluveru <cchiluve@codeaurora.org>