msm: ipa3: fix race condition in SSR

On pipe setup, enable data path should happen for after
all pipe resources are allocated.
This change prevents a race condition where the pipe is enabled
before RX buffers are submitted to IPA.
Then, when buffers are submitted to IPA there is a race between
submitting the buffers and getting RX packets.

CRs-Fixed: 1096357
Change-Id: Ic32924b6893bb8c7813b1b8e68e03b5e09560b69
Acked-by: Ady Abraham <adya@qti.qualcomm.com>
Signed-off-by: Skylar Chang <chiaweic@codeaurora.org>