blackfin: add bf60x to current framework

This patch added bf60x to current blackfin kernel framework.

Signed-off-by: Bob Liu <lliubbo@gmail.com>
diff --git a/arch/blackfin/include/asm/bfin-global.h b/arch/blackfin/include/asm/bfin-global.h
index 17bcbf6..a83e922 100644
--- a/arch/blackfin/include/asm/bfin-global.h
+++ b/arch/blackfin/include/asm/bfin-global.h
@@ -35,6 +35,11 @@
 
 extern unsigned long get_cclk(void);
 extern unsigned long get_sclk(void);
+#ifdef CONFIG_BF60x
+extern unsigned long get_sclk0(void);
+extern unsigned long get_sclk1(void);
+extern unsigned long get_dramclk(void);
+#endif
 extern unsigned long sclk_to_usecs(unsigned long sclk);
 extern unsigned long usecs_to_sclk(unsigned long usecs);