mmc: sdhci-st: Add sdhci_st_set_uhs_signaling function.
mmc: sdhci-st: Add sdhci_st_set_uhs_signaling function.

To allow UHS modes to work properly we need to provide the st specific
set_uhs_signaling callback function. This function differs from the
generic sdhci_set_uhs_signaling callback in that we need to configure
the correct delay depending on the UHS mode, and also set the V18_EN
bit.

Signed-off-by: Peter Griffin <82f81e62be2bf153f8e7977fe8d5e19723573a1d@linaro.org>
Signed-off-by: Giuseppe Cavallaro <1fb0826c4013dcaad10d5438f18a217d041fece3@st.com>
Acked-by: Maxime Coquelin <9a2667dee3b90866bbc9c2696cff2b7d5616c95a@st.com>
Signed-off-by: Ulf Hansson <fe47b31f388f85ce6ddf64bf3a0cf6b46077d0e6@linaro.org>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs