Fixed sector size for SAME51

According to datasheet DS60001507, section 25.6.2:

"The NVM is organized into two banks, each bank is organized into blocks, where each block contains
sixteen pages and page size is 512 bytes."

Author: danielinux

IDE/MPLAB/test-app/test-usb-updater.same51.X/app.c

@@ -47,7 +47,7 @@ void APP_Initialize(void) {
     wolfBoot_success();
     ver = wolfBoot_current_firmware_version();
 #else
-    #define WOLFBOOT_SECTOR_SIZE (0x8000)
+    #define WOLFBOOT_SECTOR_SIZE (0x2000)
     #define WOLFBOOT_PARTITION_SIZE (0x20000)
     #define WOLFBOOT_PARTITION_UPDATE_ADDRESS (0x088000)
     ver = 1U;

config/examples/same51-dualbank.config

@@ -6,7 +6,7 @@ VTOR?=1
 SPMATH?=1
 ARCH_FLASH_OFFSET=0x00000000
 WOLFBOOT_PARTITION_SIZE?=0x20000
-WOLFBOOT_SECTOR_SIZE?=0x8000
+WOLFBOOT_SECTOR_SIZE?=0x2000
 WOLFBOOT_PARTITION_BOOT_ADDRESS?=0x08000
 WOLFBOOT_PARTITION_UPDATE_ADDRESS?=0x088000
 WOLFBOOT_PARTITION_SWAP_ADDRESS?=0x200000

config/examples/same51.config

@@ -6,7 +6,7 @@ VTOR?=1
 SPMATH?=1
 ARCH_FLASH_OFFSET=0x00000000
 WOLFBOOT_PARTITION_SIZE?=0x20000
-WOLFBOOT_SECTOR_SIZE?=0x8000
+WOLFBOOT_SECTOR_SIZE?=0x2000
 WOLFBOOT_PARTITION_BOOT_ADDRESS?=0x8000
 WOLFBOOT_PARTITION_UPDATE_ADDRESS?=0x80000
 WOLFBOOT_PARTITION_SWAP_ADDRESS?=0xF8000