lantiq: export soc type

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

Backport of r42181

git-svn-id: svn://svn.openwrt.org/openwrt/branches/barrier_breaker@42360 3c298f89-4303-0410-b956-a3cf2f4a3e73

target/linux/lantiq/patches-3.10/0209-lantiq-export-soc-type.patch

+--- a/arch/mips/include/asm/mach-lantiq/lantiq.h
++++ b/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
+--- a/arch/mips/lantiq/prom.c
++++ b/arch/mips/lantiq/prom.c
+@@ -35,6 +35,11 @@ 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)
+ {
+ }