Blackfin: Add missing dep to asm/irqflags.h

Add a missing dependency (mach/blackfin.h) to asm/irqflags.h so that
bfin_read_IMASK() can be used by inline functions.
Signed-off-by: David Howells <dhowells@redhat.com>

arch/blackfin/include/asm/irqflags.h

@@ -8,6 +8,8 @@
 #ifndef __ASM_BFIN_IRQFLAGS_H__
 #define __ASM_BFIN_IRQFLAGS_H__
 
+#include <mach/blackfin.h>
+
 #ifdef CONFIG_SMP
 # include <asm/pda.h>
 # include <asm/processor.h>
@@ -185,7 +187,12 @@ static inline void raw_local_irq_enable(void)
 	bfin_sti(bfin_irq_flags);
 }
 
-#define raw_local_save_flags(flags) do { (flags) = bfin_read_IMASK(); } while (0)
+static inline unsigned long arch_local_save_flags(void)
+{
+	return bfin_read_IMASK();
+}
+
+#define raw_local_save_flags(flags) do { (flags) = arch_local_save_flags(); } while (0)
 
 #define raw_irqs_disabled_flags(flags) (((flags) & ~0x3f) == 0)