There's nothing LM4-specific about the switch module; it's just
checking GPIOs and updating a memory-mapped register.
No code changes; just moving a file.
BUG=chrome-os-partner:18343
BRANCH=none
TEST=verify switch.c is compiled for link and falco, but not pit or spring
Change-Id: I186f3aac1405c7ba8d94b47bb2586c2ad191daba
Signed-off-by: Randall Spangler <rspangler@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/61930
