[POWERPC] Rename get_property to of_get_property

This is more consistent and gets us closer to the Sparc code.

We add a get_property define for compatibility during the change over.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
3 files changed