[PATCH v3] Create add_rtc() function to enable the RTC CMOS driver

[Paul Mackerras]

Wade Farnsworth writes:

> In order to use the RTC CMOS driver, each architecture must register a
> platform device for the RTC.
> 
> This creates a function to register the platform device based on the RTC
> device node and verifies that the RTC port against the hard-coded value
> in asm/mc146818rtc.h.

The patch appears to be line-wrapped.  Please re-send.

Paul.