msm: ipa: add support for cfg, metadata_mask and UL pipe sharing

APPS UL pipe is shared for LAN and WAN traffic. LAN path uses IPA
as a DMA engine while WAN path uses full IPA HW capabilities. Also
add support for EP config (frag, checksum)  and metadata_mask
configuration.

Change-Id: Iac648ff50e7c6e4e2bdfff8611005e017e8395f9
Signed-off-by: Ravi Gummadidala <rgummadi@codeaurora.org>