board: stm32mp1: update the gpio hog support

This patch updates the current gpio hog implementation and uses
the new API gpio_hog_probe_all(), activated with CONFIG_GPIO_HOG.

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@st.com>
1 file changed