amd/stoneyridge: Create new wide IO functions

Create new generic wide IO functions in southbridge.c. These new
functions must be usable by kahlee/ec.c and amd/stoneyridge/lpc.c.

BUG=b:64033893
TEST=Just build at this stage, full boot to OS and verify serial output
at related change 14fdd03a83. Some extra outputs for testing removed
when code was committed.

Change-Id: Icd0841a1959f3e109b3c35fa35bb4b3c44099dc3
Signed-off-by: Richard Spiegel <richard.spiegel@silverbackltd.com>
Reviewed-on: https://review.coreboot.org/22590
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>
2 files changed