ASPEED device tree updates for 5.12

 - New machines

  * Ampere Mt. Jade, an AST2500 BMC for an x86 server
  * IBM Everest, an AST2600 BMC for a Power10 server
  * Supermicro x11spi, an AST2500 BMC for an ARM server

 - AST2600 eMMC clock phase configuration

 - Proper clock support for LPC snoop

 - Misc updates to ethanolx, mowgli, ast2600evb, g220a, and rainier

ARM: dts: aspeed: ast2600evb: Add enable ehci and uhci

Signed-off-by: Ryan Chen <ryan_chen@aspeedtech.com>
Link: https://lore.kernel.org/r/20201009024937.11246-4-ryan_chen@aspeedtech.com
Signed-off-by: Joel Stanley <joel@jms.id.au>