linux-aspeed: Add internal RTC driver

This is not enabled for any of the in-tree systems at this stage as they
all use an i2c battery-backed RTC.

Joel Stanley (4):
      rtc: Add ASPEED RTC driver
      dt-bindings: rtc: Add ASPEED description
      ARM: aspeed: Add RTC node

(From meta-aspeed rev: 341ba1dd3d5128ec54c5623b829dae4001b363f6)

Change-Id: Ia9fe9ec935f8558273c1dfa3a7bbb69a5c95335f
Signed-off-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>