dmaengine: pl08x: handle the rest of enums in pl08x_width

pl08x_width function does not handle rest of enums for DMA_SLAVE_BUSWIDTH_xxxx
which causes gcc to emit below warining

drivers/dma/amba-pl08x.c: In function 'pl08x_width':
	drivers/dma/amba-pl08x.c:1119: warning: enumeration value
	'DMA_SLAVE_BUSWIDTH_UNDEFINED' not handled in switch
	drivers/dma/amba-pl08x.c:1119: warning: enumeration value
	'DMA_SLAVE_BUSWIDTH_8_BYTES' not handled in switch

this patch adds a default case which returns error

Signed-off-by: Vinod Koul <vinod.koul@intel.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/dma/amba-pl08x.c b/drivers/dma/amba-pl08x.c
index 9aa2bd4452d3..196a7378d332 100644
--- a/drivers/dma/amba-pl08x.c
+++ b/drivers/dma/amba-pl08x.c
@@ -1123,8 +1123,9 @@ static u32 pl08x_width(enum dma_slave_buswidth width)
                 return PL080_WIDTH_16BIT;
         case DMA_SLAVE_BUSWIDTH_4_BYTES:
                 return PL080_WIDTH_32BIT;
+        default:
+                return ~0;
         }
-        return ~0;
 }
 
 static u32 pl08x_burst(u32 maxburst)