[PATCH] Optimize qe_brg struct to use an array

The qe_brg structure manually defined each of the 16 BRG registers, which
made any code that used them cumbersome.  This patch replaces the fields
with a single 16-element array.

Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>