ARM: dts: stm32: add cd-gpios properties for SD-cards on STM32MP1 boards

The broken-cd properties are replaced with cd-gpios, with the correct
GPIO to detect the card insertion. The GPIO lines require a pull-up.

Signed-off-by: Yann Gautier <yann.gautier@st.com>
Signed-off-by: Alexandre Torgue <alexandre.torgue@st.com>