Update test device callout path for association.

New device path in kernel 4.10 is
/sys/devices/platform/gpio-fsi/fsi0/slave@00:00/raw

Resolves  openbmc/openbmc-test-automation#903

Change-Id: I93f1174e04494157861dcee227cbf39bc2ea0fa0
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
1 file changed