boards: lpcxpresso55s69: fix TFM offset for builds without MCUboot

The flash layout definition has changed in upstream TF-M for the
LCPXPRESSO55S69 platform, for builds without bootloader. Fix the
layout in the boards' configuration, as well.

Signed-off-by: Ioannis Glaropoulos <[email protected]>

Author: ioannisg

boards/arm/lpcxpresso55s69/Kconfig.defconfig

@@ -43,7 +43,7 @@ config FLASH_LOAD_SIZE
 if TRUSTED_EXECUTION_NONSECURE || BOARD_LPCXPRESSO55S69_CPU1
 
 config FLASH_LOAD_OFFSET
-	default 0x40000 if !TFM_BL2
+	default 0x50000 if !TFM_BL2
 	default $(dt_chosen_reg_addr_hex,$(DT_CHOSEN_Z_CODE_PARTITION))
 
 config FLASH_LOAD_SIZE