ARM: 5712/1: SA1100: initialise spinlock in DMA code

Declare it using DEFINE_SPINLOCK()
Signed-off-by: Dmitry Artamonow <mad_soft@inbox.ru>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/mach-sa1100/dma.c

@@ -39,7 +39,7 @@ typedef struct {
 
 static sa1100_dma_t dma_chan[SA1100_DMA_CHANNELS];
 
-static spinlock_t dma_list_lock;
+static DEFINE_SPINLOCK(dma_list_lock);
 
 
 static irqreturn_t dma_irq_handler(int irq, void *dev_id)