Clock frequency values written to an mmc host should not be less than
the minimum clock frequency which the mmc host supports.
Signed-off-by: NYuan Juntao <juntaox.yuan@intel.com>
Signed-off-by: NPawel Wodkowski <pawelx.wodkowski@intel.com>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>