configs: stm32mp13: Increase usb_pgood_delay for ST boards

With some USB device, the current usb_pgood_delay value is not long
enough to ensure a correct detection.

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