ARM: dts: aspeed: Add Everest BMC machine

Add the Everest machine powered by an AST2600 chip. Copy the basic
configuration from Rainier.
Signed-off-by: Eddie James <eajames@linux.ibm.com>
Tested-by: Andrew Geissler <geissonator@gmail.com>
Link: https://lore.kernel.org/r/20201211170704.27640-1-eajames@linux.ibm.comSigned-off-by: Joel Stanley <joel@jms.id.au>

arch/arm/boot/dts/Makefile

@@ -1416,6 +1416,7 @@ dtb-$(CONFIG_ARCH_ASPEED) += \
 	aspeed-bmc-facebook-wedge400.dtb \
 	aspeed-bmc-facebook-yamp.dtb \
 	aspeed-bmc-facebook-yosemitev2.dtb \
+	aspeed-bmc-ibm-everest.dtb \
 	aspeed-bmc-ibm-rainier.dtb \
 	aspeed-bmc-ibm-rainier-4u.dtb \
 	aspeed-bmc-intel-s2600wf.dtb \