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 <peter.griffin@linaro.org> Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com> Acked-by: Maxime Coquelin <maxime.coquelin@st.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>