[SPARC64]: Fix floppy build failure.

Just define a local {claim,release}_dma_lock() implementation
for the floppy driver to use so we don't need to define and
export to modules the silly dma_spin_lock.

Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/asm-sparc64/floppy.h b/include/asm-sparc64/floppy.h
index dbe033e..331013a 100644
--- a/include/asm-sparc64/floppy.h
+++ b/include/asm-sparc64/floppy.h
@@ -854,4 +854,15 @@
 
 #define EXTRA_FLOPPY_PARAMS
 
+static DEFINE_SPINLOCK(dma_spin_lock);
+
+#define claim_dma_lock() \
+({	unsigned long flags; \
+	spin_lock_irqsave(&dma_spin_lock, flags); \
+	flags; \
+})
+
+#define release_dma_lock(__flags) \
+	spin_unlock_irqrestore(&dma_spin_lock, __flags);
+
 #endif /* !(__ASM_SPARC64_FLOPPY_H) */