Increase IMAGE_HEADER_SIZE on stm32h5

This is needed to accommodate for the ARM Cortex-M33 interrupt vector
alignment requirements. The number of interrupts on the STM32H5 is 149;
the next power of 2 is 256; in bytes, that is 1024.

Author: mattia-moffa

config/examples/stm32h5-dualbank.config

@@ -25,3 +25,4 @@ WOLFBOOT_PARTITION_UPDATE_ADDRESS?=0x8140000
 WOLFBOOT_PARTITION_SWAP_ADDRESS?=0xFFFFFFFF
 FLAGS_HOME=0
 DISABLE_BACKUP=0
+IMAGE_HEADER_SIZE?=1024

config/examples/stm32h5-tz-dualbank-otp.config

@@ -28,4 +28,5 @@ DISABLE_BACKUP=0
 FLASH_OTP_KEYSTORE=1
 WOLFCRYPT_TZ=1
 WOLFCRYPT_TZ_PKCS11=1
-ARMORED=1
+ARMORED=1
+IMAGE_HEADER_SIZE?=1024

config/examples/stm32h5-tz.config

@@ -27,3 +27,4 @@ FLAGS_HOME=0
 DISABLE_BACKUP=0
 WOLFCRYPT_TZ=1
 WOLFCRYPT_TZ_PKCS11=1
+IMAGE_HEADER_SIZE?=1024

config/examples/stm32h5.config

@@ -25,3 +25,4 @@ WOLFBOOT_PARTITION_UPDATE_ADDRESS?=0x8140000
 WOLFBOOT_PARTITION_SWAP_ADDRESS?=0x08010000
 FLAGS_HOME=0
 DISABLE_BACKUP=0
+IMAGE_HEADER_SIZE?=1024