Split the read_hash_otp function and introduce the helper function read_close_status to read the close status in OTP separately of the PKH. This patch is a preliminary step for STM32MP13 support. Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com> Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>