Suggested by Jaehoon: Use slot-gpio to handle cd-gpio
Add function dw_mci_of_get_cd_gpio to check "cd-gpios" from dts.
mmc_gpio_request_cd and mmc_gpio_get_cd are used to handle cd pin
Signed-off-by: NZhangfei Gao <zhangfei.gao@linaro.org>
Acked-by: NJaehoon Chung <jh80.chung@samsung.com>
Acked-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NChris Ball <chris@printf.net>