Revert "Call get_unaligned() in various places"

This reverts commit 74847768df924221df0401e04556ce010ba5da0f.

We used get_unaligned() to work around the issue where the IPv4 header
was not properly aligned on a 4-byte boundary. Quantenna recently added
code to memmove IPv4 packets to ensure proper alignment. Hence, the
calls to get_unaligned() are no longer needed.

Change-Id: I295531a6edb838bccc03978f2af6595d18542634
6 files changed