Start split out of common open firmware code

This creates drivers/of/base.c (depending on CONFIG_OF) and puts
the first trivially common bits from the prom.c files into it.

Signed-off-by: Stephen Rothwell <[email protected]>
Acked-by: Paul Mackerras <[email protected]>
Acked-by: David S. Miller <[email protected]>
12 files changed