blackfin: asm: fix blackfin.h broken

do{...}while makes no sense in __ASSEMBLY__ code paths.  now
kernels fail to build:
arch/blackfin/mach-bf561/atomic.S: Assembler messages:
arch/blackfin/mach-bf561/atomic.S:48: Error: syntax error. Input text
was do.
arch/blackfin/mach-bf561/atomic.S:48: Error:
arch/blackfin/mach-bf561/atomic.S:48: Error: syntax error. Input text
was }.
arch/blackfin/mach-bf561/atomic.S:48: Error:
arch/blackfin/mach-bf561/atomic.S:53: Error: syntax error. Input text
was do.
arch/blackfin/mach-bf561/atomic.S:53: Error:
arch/blackfin/mach-bf561/atomic.S:53: Error: syntax error. Input text
was }.

Signed-off-by: Bob Liu <lliubbo@gmail.com>
diff --git a/arch/blackfin/include/asm/blackfin.h b/arch/blackfin/include/asm/blackfin.h
index 7be5368..f111f36 100644
--- a/arch/blackfin/include/asm/blackfin.h
+++ b/arch/blackfin/include/asm/blackfin.h
@@ -63,20 +63,16 @@
 
 #if ANOMALY_05000312 || ANOMALY_05000244
 #define SSYNC(scratch)	\
-do {			\
 	cli scratch;	\
 	nop; nop; nop;	\
 	SSYNC;		\
-	sti scratch;	\
-} while (0)
+	sti scratch;
 
 #define CSYNC(scratch)	\
-do {			\
 	cli scratch;	\
 	nop; nop; nop;	\
 	CSYNC;		\
-	sti scratch;	\
-} while (0)
+	sti scratch;
 
 #else
 #define SSYNC(scratch) SSYNC;