ioat2,3: disable asynchronous error notifications

Error interrupts and error completions may cause channel hangs, so
poll the channel status register after a timeout.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>

drivers/dma/ioat/registers.h

@@ -92,9 +92,7 @@
 #define IOAT_CHANCTRL_ERR_COMPLETION_EN		0x0004
 #define IOAT_CHANCTRL_INT_REARM			0x0001
 #define IOAT_CHANCTRL_RUN			(IOAT_CHANCTRL_INT_REARM |\
-						 IOAT_CHANCTRL_ERR_COMPLETION_EN |\
-						 IOAT_CHANCTRL_ANY_ERR_ABORT_EN |\
-						 IOAT_CHANCTRL_ERR_INT_EN)
+						 IOAT_CHANCTRL_ANY_ERR_ABORT_EN)
 
 #define IOAT_DMA_COMP_OFFSET			0x02	/* 16-bit DMA channel compatibility */
 #define IOAT_DMA_COMP_V1			0x0001	/* Compatibility with DMA version 1 */