Unlike other devices supported by this driver STM32U5 devices
have a new UNLOCK bit in FLASH_WRP1AR, WRP1BR, WRP2AR, WRP2BR
registers. Writing zero to this bit makes the write protection
block permanent with no way to unprotect.
Commit 6554d176e9 ("flash/stm32l4x: support STM32U59/U5Ax devices")
and later commits with additional U5 devices lack support for
the UNLOCK bit and therefore makes write protection permanent
without warning.
Introduce the new bit flag F_WRP_HAS_LOCK and mark U5 devices by it.
Set UNLOCK bit in stm32l4_write_one_wrpxy() if F_WRP_HAS_LOCK is set.
Change-Id: I26b97d855e094a21540e3377f367520683af2eac
Signed-off-by: Tomas Vanek <vanekt@fbl.cz>
Reviewed-on: https://review.openocd.org/c/openocd/+/8981
Tested-by: jenkins
cbc32c3831