net: qualcomm: rmnet: Add workaround for hardware

Add workaround for hardware specific behavior to
compute partial checksum.

Change-Id: I57858d3fe8c3fc142fd6959d72fcd2fd68398cd0
Signed-off-by: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>
Signed-off-by: Sharath Chandra Vurukala <sharathv@codeaurora.org>