MIPS: lantiq: drop mips_machine support

Before we are able to add OF support, we really want to drop all the bloat
needed to register all the platform devices.

Signed-off-by: John Crispin <blogic@openwrt.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/3800/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/lantiq/prom.h

@@ -24,7 +24,6 @@ struct ltq_soc_info {
 };
 
 extern void ltq_soc_detect(struct ltq_soc_info *i);
-extern void ltq_soc_setup(void);
 extern void ltq_soc_init(void);
 
 #endif