nrf52820_hic: remove CMSIS headers and minor clean-ups

Author: mathias-arm

docs/hic/nrf52820.md

@@ -2,7 +2,7 @@
 
 Based on Nordic [nRF52820](https://www.nordicsemi.com/Products/nRF52820):
 - Cortex-M4 64 MHz
--256 KB Flash
+- 256 KB Flash
 - 32 KB RAM
 - Full-speed USB 2.0 device controller
 - QFN40 packaging
@@ -60,31 +60,3 @@ Note:
 
 Note:
 - LEDs have active state high.
-
-## nRF52833-DK pin assignment
-
-For development on [nRF52833-DK](https://www.nordicsemi.com/Products/Development-hardware/nRF52833-DK).
-
-| Signal      | I/O | Symbol  | Connection |
-|-------------|:---:|---------|:----------:|
-| SWD         |
-| SWCLK       |  O  |  P0.04  |            |
-| SWDIO       | I/O |  P0.05  |            |
-| nRESET      |  O  |  P0.07  |            |
-| UART        |
-| UART RX     |  I  |  P0.08  |  J-Link TX |
-| UART TX     |  O  |  P0.06  |  J-Link RX |
-| UART (alt)  |
-| UART RX     |  I  |  P0.29  |            |
-| UART TX     |  O  |  P0.30  |            |
-| Button      |
-| F-RST  But. |  I  |  P0.11  |  BUTTON_1  |
-| LEDs        |
-| RUN LED     |  O  |  P0.13  |   LED_1    |
-| CON LED     |  O  |  P0.14  |   LED_2    |
-| HID LED     |  O  |  P0.14  |   LED_2    |
-| MSD LED     |  O  |  P0.15  |   LED_3    |
-| CDC LED     |  O  |  P0.16  |   LED_4    |
-
-Note:
-- LEDs have active state low.

source/board/nrf52820_bl.c

@@ -3,7 +3,7 @@
  * @brief   board ID and meta-data for HIC based on Nordic Semiconductor nRF52820
  *
  * DAPLink Interface Firmware
- * Copyright (c) 2009-2019, ARM Limited, All Rights Reserved
+ * Copyright (c) 2009-2021, Arm Limited, All Rights Reserved
  * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License"); you may