MIPS: BCM63xx: delete double assignment

Delete successive assignments to the same location.  In each case, the
duplicated assignment is modified to be in line with other nearby code.

A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/

)

// <smpl>
@@
expression i;
@@

*i = ...;
 i = ...;
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Cc: joe@perches.com
Cc: kernel-janitors@vger.kernel.org
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/7565/


Signed-off-by: Ralf Baechle <ralf@linux-mips.org>