Revert "clk: Evict unregistered clks from parent caches"

This reverts commit 903c6bd9.

User build failing due to this upstream patch so reverting it.

Change-Id: Icb1e697d71ee18512b8ec1e5e2f8f4d7a9b7404e
Signed-off-by: Srinivasarao P <spathi@codeaurora.org>