MIPS: lantiq: export soc type

The voice and dsl drivers need to know which SoC we are running on.
Signed-off-by: NÁlvaro Fernández Rojas <noltari@gmail.com>
Patchwork: http://patchwork.linux-mips.org/patch/8046/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

arch/mips/include/asm/mach-lantiq/lantiq.h

@@ -48,6 +48,8 @@ extern struct clk *clk_get_ppe(void);
 extern unsigned char ltq_boot_select(void);
 /* find out what caused the last cpu reset */
 extern int ltq_reset_cause(void);
+/* find out the soc type */
+extern int ltq_soc_type(void);
 
 #define IOPORT_RESOURCE_START	0x10000000
 #define IOPORT_RESOURCE_END	0xffffffff

arch/mips/lantiq/prom.c

@@ -36,6 +36,11 @@ const char *get_system_type(void)
 	return soc_info.sys_type;
 }
 
+int ltq_soc_type(void)
+{
+	return soc_info.type;
+}
+
 void prom_free_prom_memory(void)
 {
 }