Blackfin: dma: bf54x: add missing break for SPORT1 TX IRQ

Reported-by: D Binderman <dcb314@hotmail.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
diff --git a/arch/blackfin/mach-bf548/dma.c b/arch/blackfin/mach-bf548/dma.c
index 039a6d9..888b9cc 100644
--- a/arch/blackfin/mach-bf548/dma.c
+++ b/arch/blackfin/mach-bf548/dma.c
@@ -63,6 +63,7 @@
 		break;
 	case CH_SPORT1_TX:
 		ret_irq = IRQ_SPORT1_TX;
+		break;
 	case CH_SPI0:
 		ret_irq = IRQ_SPI0;
 		break;