Reduces an x86 defconfig text and data ~55k, .6% smaller.

$ size vmlinux*
   text	   data	    bss	    dec	    hex	filename
7205273	 716016	1366288	9287577	 8db799	vmlinux
7258890	 719768	1366288	9344946	 8e97b2	vmlinux.master

Uses %pV and struct va_format
Format arguments are verified before printk

The dev_info macro is converted to _dev_info because there are
existing uses of variables named dev_info in the kernel tree
like drivers/net/pcmcia/pcnet_cs.c

A dev_info macro is created to call _dev_info
Signed-off-by: NJoe Perches <joe@perches.com>
Acked-by: NGreg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>