Documentation: Improve elgon documentation

* Convert PNG to JPG and reduce image quality.
* Mark flash IC and USB serial connector.
* Mark SPI programming header.
* Add programming header pinout.

Change-Id: Ica5958545ed23573a0d48dfa422ad1a822d06b47
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/28966
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Philipp Deppenwiese <zaolin.daisuki@gmail.com>

1 files changed, 0 insertions, 0 deletions

diff --git a/Documentation/mainboard/opencellular/elgon2.jpg b/Documentation/mainboard/opencellular/elgon2.jpg
new file mode 100644
index 0000000000..63c0b6c383
--- /dev/null
+++ b/Documentation/mainboard/opencellular/elgon2.jpg