gpio-presence: Pass drivers in to application

With the optional --drivers argument, pass in the
path/device pairs to bind/unbind.  That string will be parsed,
and then passed into the Presence class.

Change-Id: I1ac0e005de673a679dcb45e93bcac35fddf24d01
Signed-off-by: Matt Spinler <spinler@us.ibm.com>
2 files changed