omap3/sys_info: provide interface to read die id

introduce get_die_id() function which allows generation of
information such as fake MAC address from the processor ID code.

Signed-off-by: Nishanth Menon <nm@ti.com>
diff --git a/arch/arm/include/asm/arch-omap3/sys_proto.h b/arch/arm/include/asm/arch-omap3/sys_proto.h
index 10300f4..75bf314 100644
--- a/arch/arm/include/asm/arch-omap3/sys_proto.h
+++ b/arch/arm/include/asm/arch-omap3/sys_proto.h
@@ -68,6 +68,7 @@
 void omap_nand_switch_ecc(uint32_t, uint32_t);
 void power_init_r(void);
 void dieid_num_r(void);
+void get_dieid(u32 *id);
 void do_omap3_emu_romcode_call(u32 service_id, u32 parameters);
 void omap3_gp_romcode_call(u32 service_id, u32 parameter);
 u32 warm_reset(void);