Increase settings area to 2k (as per PR comments)

Author: mmoskal

src/linker/nrf52840_s140_v6.ld

@@ -11,9 +11,9 @@ MEMORY
    *  those values do not match. The check is performed in main.c, see
    *  APP_ERROR_CHECK_BOOL(*((uint32_t *)NRF_UICR_BOOT_START_ADDRESS) == BOOTLOADER_REGION_START);
    */
-  FLASH (rx) : ORIGIN = 0xF4000, LENGTH = 0xFE000-0xF4000-1024 /* 39 KB */
+  FLASH (rx) : ORIGIN = 0xF4000, LENGTH = 0xFE000-0xF4000-2048 /* 38 KB */
 
-  BOOTLOADER_CONFIG (r): ORIGIN = 0xFE000 - 1024, LENGTH = 1024
+  BOOTLOADER_CONFIG (r): ORIGIN = 0xFE000 - 2048, LENGTH = 2048
 
   /** Location of mbr params page in flash. */
   MBR_PARAMS_PAGE (rw) : ORIGIN = 0xFE000, LENGTH = 0x1000