msm:ipa:Prevent rt rule deletion if rt rule id is invalid

Currently RT is deleted even if rt rule or header proc ctx
is invalid. Add check to prevent it.

Change-Id: Ic37ff9a33fab2b3c0d6393e43452e4b62a91d932
Acked-by: Pooja Kumari <kumarip@qti.qualcomm.com>
Signed-off-by: Mohammed Javid <mjavid@codeaurora.org>