ARM: dts: stm32: Add gpio-keys for stm32mp135f-dk-u-boot

Add 2 gpio-keys :
  _ button-user-1 for stm32prog mode activation.
  _ update button-user's label (defined in kernel DT) to match label
    requested in board_key_check() for fastboot mode activation.

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