Board images for Orange Pi RV2 and Orange Pi R2S (#201)

* Board images for Orange Pi RV2 and Orange Pi R2S

The orangepirv2.png image was taken from my board. I use it
with an UART (wires cut in photo) and a Samsung NVME 128 Gb
SSD.

The orangepir2s.png is for reference only. I do not own this
board, but I asked at the OpenWrt forum for a photo. Github
member https://github.com/peterwillcn was so kind and add
this photo of his R2S board to the merge RQ, see
armbian/build#9299 (comment)

Signed-off-by: Sven-Ola Tuecke <sven-ola@gmx.de>

* Add improved picture

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Signed-off-by: Sven-Ola Tuecke <sven-ola@gmx.de>
Co-authored-by: Igor Pecovnik <igor@armbian.com>

Author: sven-ola