consumer: Added hikey970 to documentation lineup in table

Signed-off-by: Robert Wolff <robert.wolff@linaro.org>

consumer/README.md

@@ -23,6 +23,7 @@ Select your Consumer Edition 96Boards device to access all product specific reso
 
 | 96Boards                                         | About                                                  | Options                    |
 |:------------------------------------------------:|:------------------------------------------------------:|:--------------------------:|
+| <img src="https://github.com/96boards/documentation/blob/master/consumer/hikey970/additional-docs/images/images-board/sd/hikey970-front-sd.png?raw=true" data-canonical-src="https://github.com/96boards/documentation/blob/master/consumer/hikey970/additional-docs/images/images-board/sd/hikey970-front-sd.png?raw=true" width="200" height="130" /><br> **HiKey970** | Board based on the HI3670 Application Processor | [Documentation](hikey970/)<br> |
 | <img src="https://github.com/96boards/documentation/blob/master/consumer/chameleon96/additional-docs/images/images-board/chameleon96_top.png?raw=true" data-canonical-src="https://github.com/96boards/documentation/blob/master/consumer/chameleon96/additional-docs/images/images-board/chameleon96_top.png?raw=true" width="200" height="130" /><br> **Chameleon96** | Board based on the Intel Cyclone V SoC FPGA | [Documentation](chameleon96/)<br> |
 | <img src="https://github.com/96boards/documentation/blob/master/consumer/rock960/additional-docs/images/images-board/ROCK960_Front_SD.png?raw=true" data-canonical-src="https://github.com/96boards/documentation/blob/master/consumer/rock960/additional-docs/images/images-board/ROCK960_Front_SD.png?raw=true" width="200" height="130" /><br> **ROCK960** | Board based on Rockchip RK3399  | [Documentation](rock960/)<br> |
 | <img src="https://github.com/96boards/documentation/blob/master/consumer/ultra96/additional-doc/images/images-board/sd/ultra96-front-sd.png?raw=true" data-canonical-src="https://github.com/96boards/documentation/blob/master/consumer/ultra96/additional-doc/images/images-board/sd/ultra96-front-sd.png?raw=true" width="200" height="130" /><br> **Ultra96** | Board based on Xilinx Zynq UltraScale+ MPSoC ZU3EG A484  | [Documentation](ultra96/)<br> |