Revert "ANDROID: dma-ops: Add restricted vendor hook"

This reverts commit 9d2ec2e0.

The hook android_rvh_setup_dma_ops is not used by any vendor, so remove
it to help with merge issues with future LTS releases.

If this is needed by any real user, it can easily be reverted to add it
back and then the symbol should be added to the abi list at the same
time to prevent it from being removed again later.

Bug: 263236925
Bug: 203756332
Cc: Beata Michalska <beata.michalska@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I7741910039ac9914e2e2adf974204278d37db94d