Blackfin: SMP: rename the arch_xxx lock funcs to __raw_xxx

The external functions are named __raw_xxx, not arch_xxx, so rename the
prototypes to match reality.  This fixes some simple build errors in the
bfin_ksyms.c code which exports these helpers to modules.

Signed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
diff --git a/arch/blackfin/include/asm/cacheflush.h b/arch/blackfin/include/asm/cacheflush.h
index 2666ff8..77135b6 100644
--- a/arch/blackfin/include/asm/cacheflush.h
+++ b/arch/blackfin/include/asm/cacheflush.h
@@ -11,6 +11,9 @@
 
 #include <asm/blackfin.h>	/* for SSYNC() */
 #include <asm/sections.h>	/* for _ramend */
+#ifdef CONFIG_SMP
+#include <asm/smp.h>
+#endif
 
 extern void blackfin_icache_flush_range(unsigned long start_address, unsigned long end_address);
 extern void blackfin_dcache_flush_range(unsigned long start_address, unsigned long end_address);