google/setzer: add new board as variant of cyan baseboard

Add support for google/setzer (HP Chromebook 11 G5) as
a variant of the cyan Braswell baseboard.

- Add board-specific code as the new setzer variant
- Add new I2C touchscreen device and SPD files to the baseboard
for potential reuse by other variants

Sourced from Chromium branch firmware-strago-7287.B,
commit 02dc8db: Banon: 2nd source DDR memory (Micro-MT52L256M32D1PF)

Change-Id: Ibcebebeb469c4bd6139b8ce83a1ca5ca560c2252
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/21575
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>
15 files changed