common: Improve `find_i2c_device_by_name` doc comment

Being more specific about what type of sysfs path its finding should be
useful given the number of different sysfs paths flying around.

BUG=none
TEST=none

Change-Id: I07389718c65ee2ff1d3c849f1f18911380cfba64
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/touch_updater/+/2761919
Tested-by: Harry Cutts <hcutts@chromium.org>
Auto-Submit: Harry Cutts <hcutts@chromium.org>
Reviewed-by: Sean O'Brien <seobrien@chromium.org>
Commit-Queue: Harry Cutts <hcutts@chromium.org>
1 file changed