ARM: stm32: Rename update_sf to dh_update_sd_to_sf on STM32MP15xx DHCOR

Align the script name with DH i.MX8MP DHCOM script name. Add
backward compatibility script to avoid breaking user scripts.

Signed-off-by: Marek Vasut <marex@denx.de>
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>
1 file changed