[PATCH v5 2/2] x86: coral: Show memory config and SKU ID on startup

[Simon Glass]

Provide the model information through sysinfo so that it shows up on
boot. For memconfig 4 pins are provided, for 16 combinations. For SKU
ID there are two options:

   - two pins provided in a ternary arrangement, for 9 combinations.
   - reading from the EC

Add a binding doc and drop the unused #defines as well.

Example:

   U-Boot 2021.01-rc5

   CPU:   Intel(R) Celeron(R) CPU N3450 @ 1.10GHz
   DRAM:  3.9 GiB
   MMC:   sdmmc at 1b,0: 1, emmc at 1c,0: 2
   Video: 1024x768x32 @ b0000000
   Model: Google Coral (memconfig 5, SKU 3)

This depends on the GPIO series:

   http://patchwork.ozlabs.org/project/uboot/list/?series=228126

Signed-off-by: Simon Glass <sjg at chromium.org>

Acked-by: Bin Meng <bmeng.cn at gmail.com>
---

Changes in v5:
- Rebase to upstream/next

Changes in v4:
- Rebase to x86/master (but will not build until GPIO series lands)
- Update cover letter

Changes in v3:
- Rebase to master
- Drop patches previously applied

Changes in v2:
- Fix two missing asterisks in comments

 arch/x86/dts/chromebook_coral.dts             |  11 ++
 board/google/chromebook_coral/coral.c         | 139 +++++++++++++++++-
 board/google/chromebook_coral/variant_gpio.h  |   6 -
 .../sysinfo/google,coral.txt                  |  37 +++++
 4 files changed, 179 insertions(+), 14 deletions(-)
 create mode 100644 doc/device-tree-bindings/sysinfo/google,coral.txt

Applied to u-boot-dm/next, thanks!