mmc: exynos_dw_mmc: remove unused function

Remove unused function in exynos_dw_mmc.c.

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
1 file changed