Blackfin: use new bfin read/write mmr helper funcs

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
diff --git a/include/asm-blackfin/blackfin_local.h b/include/asm-blackfin/blackfin_local.h
index 308014a..3fd34b3 100644
--- a/include/asm-blackfin/blackfin_local.h
+++ b/include/asm-blackfin/blackfin_local.h
@@ -61,7 +61,7 @@
 extern u_long get_cclk(void);
 extern u_long get_sclk(void);
 
-# define bfin_revid() (*pCHIPID >> 28)
+# define bfin_revid() (bfin_read_CHIPID() >> 28)
 
 extern bool bfin_os_log_check(void);
 extern void bfin_os_log_dump(void);