doc/mb/upsquared: Add documentation

This patch adds documentation about the UP² mainboard
and the IFWI used by Apollolake platform.

Change-Id: Ic708ddbd2616eee4e5ec2740b3eac18b408bde38
Signed-off-by: Felix Singer <felix.singer@9elements.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/32935
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Rudolph <siro@das-labor.org>

1 files changed, 0 insertions, 0 deletions

diff --git a/Documentation/mainboard/up/squared/header_cn16_10pin_uart0.dia b/Documentation/mainboard/up/squared/header_cn16_10pin_uart0.dia
new file mode 100644
index 0000000000..a35245b9cc
--- /dev/null
+++ b/Documentation/mainboard/up/squared/header_cn16_10pin_uart0.dia