MIPS: lantiq: remove orphaned code

Now that all drivers are converted to OF we are able to remove some remaining
pieces of orphaned code.

Signed-off-by: John Crispin <blogic@openwrt.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/3841/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/lantiq/prom.c

@@ -27,12 +27,6 @@ EXPORT_SYMBOL_GPL(ebu_lock);
  */
 static struct ltq_soc_info soc_info;
 
-unsigned int ltq_get_soc_type(void)
-{
-	return soc_info.type;
-}
-EXPORT_SYMBOL(ltq_get_soc_type);
-
 const char *get_system_type(void)
 {
 	return soc_info.sys_type;