MIPS: Netlogic: Fix indentation of smpboot.S

[ralf@linux-mips.org: I've folded most segments of this patch into those
patches in -next that originally were causing the whitespace damage.
This is just what's left over]

Signed-off-by: Jayachandran C <jayachandranc@netlogicmicro.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/4094/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>