ioex: Add get_port() in PCA9675 ioex driver
ioex: Add get_port() in PCA9675 ioex driver

Zephyr shim driver requires get_port() api, this CL adds support for
get_port() api in ioexpander pca9675 driver.

BUG=b:218684235
BRANCH=none
TEST=zmake configure -B ~/tmp/adlrvp_npcx/ adlrvp_npcx -b
     make -j buildall

Signed-off-by: Rajesh Kumar <ef973afabdaa06670be7215ef6ba2acd6d71d568@intel.com>
Change-Id: Id4ad04dce6fe009d400286ce5c5b345fe39d3db1
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3462644
Reviewed-by: Vijay P Hiremath <006c712879a3af08bfdb5c2b8491a8b2d5fd73cd@intel.com>
Reviewed-by: Keith Short <f6d578f97033c25f1206cb57d52f358974c82954@chromium.org>

coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec