mmc: bcm2835: Don't overwrite max frequency unconditionally
The optional DT parameter max-frequency could init the max bus frequency. So take care of this, before setting the max bus frequency. Fixes: 660fc733 ("mmc: bcm2835: Add new driver for the sdhost controller.") Signed-off-by: Phil Elwell <phil@raspberrypi.org> Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com> Cc: <stable@vger.kernel.org> # 4.12+ Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
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