fs/seq_file.c: seq_read: Update pr_info_ratelimited

Use a more common logging style.

Add and use pr_fmt, coalesce the format string, align arguments,
use better grammar.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Vasily Averin <vvs@virtuozzo.com>
Link: http://lkml.kernel.org/r/96ff603230ca1bd60034c36519be3930c3a3a226.camel@perches.com


Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>