ARM: dts: aspeed: Add Facebook Backpack-CMM BMC

Add initial version of device tree file for Facebook Backpack CMM (Chasis Management Module) ast2500 BMC.

---
Changes in v3:
- including pin configurations in UARTs 1-4 device nodes explicitly.
- including external pinctrl controller nodes gfx and lhc explicitly.
- deleting misleading i2c-related statements from commit messages, and adding comments for i2c buses in the board device tree file.
Changes in v2:
- including "aspeed-bmc-facebook-cmm.dtb" in Makefile.

 arch/arm/boot/dts/Makefile                    |   1 +
 arch/arm/boot/dts/aspeed-bmc-facebook-cmm.dts | 368 ++++++++++++++++++
 2 files changed, 369 insertions(+)
 create mode 100644 arch/arm/boot/dts/aspeed-bmc-facebook-cmm.dts

index a7c313bfe490..2239e6a30d7a 100644
@@ -1200,6 +1200,7 @@ dtb-$(CONFIG_ARCH_ASPEED) += \
 	aspeed-ast2500-evb.dtb \
 	aspeed-bmc-arm-centriq2400-rep.dtb \
 	aspeed-bmc-arm-stardragon4800-rep2.dtb \
+	aspeed-bmc-facebook-cmm.dtb \
 	aspeed-bmc-facebook-tiogapass.dtb \
 	aspeed-bmc-intel-s2600wf.dtb \
 	aspeed-bmc-opp-lanyang.dtb \

2.17.1

Thanks. I've merged v3 for inclusion in 4.21.

Cheers,

Joel

Thank you Joel!

Cheers,

Tao