msm: net: ecm: use resource manager API for resource deletion

The new IPA resource manager API allows resource deletion.
This commit introduce the use of this API in ecm_ipa.
The ecm_ipa resource will be deleted upon driver cleanup, allowing
the clean removal of ecm_ipa.

Change-Id: I86074576ccde2bc7db62992e08282300660859d4
Signed-off-by: Talel Atias <tatias@codeaurora.org>