tile: Use the more common pr_warn instead of pr_warning

And other message logging neatening.

Other miscellanea:

o coalesce formats
o realign arguments
o standardize a couple of macros
o use __func__ instead of embedding the function name

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>