[IOAT]: fix sparse ulong warning

Fix sparse warning:
drivers/dma/ioatdma.c:444:32: warning: constant 0xFFFFFFFFFFFFFFC0 is so big it is unsigned long

Also needs a MAINTAINERS entry.
Signed-off-by: NRandy Dunlap <rdunlap@xenotime.net>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/dma/ioatdma_registers.h

@@ -76,7 +76,7 @@
 #define IOAT_CHANSTS_OFFSET			0x04	/* 64-bit Channel Status Register */
 #define IOAT_CHANSTS_OFFSET_LOW			0x04
 #define IOAT_CHANSTS_OFFSET_HIGH		0x08
-#define IOAT_CHANSTS_COMPLETED_DESCRIPTOR_ADDR	0xFFFFFFFFFFFFFFC0
+#define IOAT_CHANSTS_COMPLETED_DESCRIPTOR_ADDR	0xFFFFFFFFFFFFFFC0UL
 #define IOAT_CHANSTS_SOFT_ERR			0x0000000000000010
 #define IOAT_CHANSTS_DMA_TRANSFER_STATUS	0x0000000000000007
 #define IOAT_CHANSTS_DMA_TRANSFER_STATUS_ACTIVE	0x0