arm64: dts: qcom: qcs404: sdcc1: enable HS400

The controller can support EXT_CSD_CARD_TYPE_HS400_1_8V cards.

Signed-off-by: Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Andy Gross <andy.gross@linaro.org>