Aspeed devicetree updates for 4.12

Updates to the device tree to include upstreamed drivers:

 - SPI flash controller
 - Watchdog
 - ADC

In addition we describe some of the clocks so that upstream kernels can
boot on hardware.
arm: dts: aspeed: Describe ADCs for AST2400/AST2500

Signed-off-by: Rick Altherr <raltherr@google.com>
Signed-off-by: Joel Stanley <joel@jms.id.au>
2 files changed