wspoon: Retry on VRM bind fails

Enhanced the ir35221-unbind-bind.sh script to:

1) Retry a few times on failures binding the device driver.
2) Still try to bind other devices even if one device fails.

The script will still return a nonzero exit code if any of
the binds fail.

Tested:
 * Do several power cycles.
 * Modify script to fail a bind. Check that it returns nonzero.

Change-Id: Ia235557292d792998a1c10260fe2bf8b2e631b2c
Signed-off-by: Matt Spinler <spinler@us.ibm.com>
1 file changed