dmaengine: pl330: remove unused ‘regs’

In pl330_add(), variable ‘regs’ is initialized but never used, which
leads to warning with W=1.

drivers/dma/pl330.c: In function 'pl330_add':
drivers/dma/pl330.c:1891:16: warning: variable 'regs' set but not used [-Wunused-but-set-variable]

So remove it.

Cc: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

drivers/dma/pl330.c

@@ -1888,11 +1888,8 @@ static int dmac_alloc_resources(struct pl330_dmac *pl330)
 
 static int pl330_add(struct pl330_dmac *pl330)
 {
-	void __iomem *regs;
 	int i, ret;
 
-	regs = pl330->base;
-
 	/* Check if we can handle this DMAC */
 	if ((pl330->pcfg.periph_id & 0xfffff) != PERIPH_ID_VAL) {
 		dev_err(pl330->ddma.dev, "PERIPH_ID 0x%x !\n",