Instead of parsing the DT binding on our own, use the standard parser
mmc_of_parse(), introduced by commit 6c56e7a0.
Signed-off-by: NSimon Baatz <gmbnomis@gmail.com>
Tested-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NChris Ball <cjb@laptop.org>