dmaengine: PL08x: remove redundant spinlock

The pl08x_driver_data spinlock is only ever initialized.  Nothing else
uses it.  Let's get rid of it.
Acked-by: NLinus Walleij <linus.walleij@linaro.org>
Tested-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

drivers/dma/amba-pl08x.c

@@ -146,7 +146,6 @@ struct pl08x_driver_data {
 	int pool_ctr;
 	u8 lli_buses;
 	u8 mem_buses;
-	spinlock_t lock;
 };
 
 /*
@@ -1897,8 +1896,6 @@ static int pl08x_probe(struct amba_device *adev, const struct amba_id *id)
 		goto out_no_lli_pool;
 	}
 
-	spin_lock_init(&pl08x->lock);
-
 	pl08x->base = ioremap(adev->res.start, resource_size(&adev->res));
 	if (!pl08x->base) {
 		ret = -ENOMEM;