Check for ir35221 link presence prior to bind/unbind

Check for /sys/bus/i2c/driversir35221/4-0070, 4-0071, 5-0070,
5-0071 on unbind.

Change-Id: I3c64682bcceffc6313625be1afadd38e090bcc63
Signed-off-by: Christopher Bostic <cbostic@linux.vnet.ibm.com>
1 file changed