msm: ipa: Add aggr and hdr_ext info to DL MHIP teth pipe config

Add aggr and hdr_ext to our static pipe configuration struct
to be configured for the DL MHIP teth pipes. Update Ul pipe
config with metadata offset values. DL deaggregation is set as
bypass for now.

Change-Id: I00fd8e3e8dac4b154b5ea42c75a60eda11056c10
Signed-off-by: Michael Adisumarta <madisuma@codeaurora.org>