MIPS: BMIPS: add a smp ops registration helper

Add a helper similar to the generic register_XXX_smp_ops() for bmips.
Register SMP UP ops in case of BMIPS32/3300.

Signed-off-by: Jonas Gorski <jogo@openwrt.org>
Signed-off-by: John Crispin <blogic@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/6248/
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 7eaa412..f2f6c1d 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -1479,6 +1479,7 @@
 	select CPU_SUPPORTS_HIGHMEM
 
 config CPU_BMIPS32_3300
+	select SMP_UP if SMP
 	bool
 
 config CPU_BMIPS4350