mmc: core: Skip to set the default 200mA SD current limit

mmc: core: Skip to set the default 200mA SD current limit

Let's avoid updating the SD current limit when the maximum power is 200mA
(0.72W) or less, as this is already the default value for the SD card. In
this way we avoid sending an unnecessary command during initialization.

Signed-off-by: Avri Altman <avri.altman@sandisk.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>