of_property_read_bool

Search for a property in a device node.
Returns true if the property exist false otherwise.
Signed-off-by: NJean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Acked-by: NRob Herring <rob.herring@calxeda.com>
Acked-by: NArnd Bergmann <arnd@arndb.de>
Acked-by: NGrant Likely <grant.likely@secretlab.ca>