blackfin: smp: fix smp build after drop asm/system.h

Signed-off-by: Steven Miao <realmz6@gmail.com>

arch/blackfin/include/asm/atomic.h

@@ -11,7 +11,9 @@
 
 #ifdef CONFIG_SMP
 
+#include <asm/barrier.h>
 #include <linux/linkage.h>
+#include <linux/types.h>
 
 asmlinkage int __raw_uncached_fetch_asm(const volatile int *ptr);
 asmlinkage int __raw_atomic_update_asm(volatile int *ptr, int value);

arch/blackfin/include/asm/bitops.h

@@ -41,6 +41,7 @@
 #include <asm-generic/bitops/non-atomic.h>
 #else
 
+#include <asm/barrier.h>
 #include <asm/byteorder.h>	/* swab32 */
 #include <linux/linkage.h>