[nrf noup] boards: nrf54l15dk: Disable FPROTECT

FPROTECT is not suppored for nrf54l15dk.

Signed-off-by: Andrzej Puzdrowski <[email protected]>

Author: nvlsianpu

boot/zephyr/boards/nrf54l15dk_nrf54l15_cpuapp.conf

@@ -7,4 +7,7 @@ CONFIG_BOOT_MAX_IMG_SECTORS=256
 # Ensure that the SPI NOR driver is disabled by default
 CONFIG_SPI_NOR=n
 
+# TODO: below are not yet supported and need fixing
+CONFIG_FPROTECT=n
+
 CONFIG_BOOT_WATCHDOG_FEED=n