pata_falcon: Avoid type warnings from sparse

The zero day bot reported some sparse complaints in pata_falcon.c. E.g.

drivers/ata/pata_falcon.c:58:41: warning: cast removes address space '__iomem' of expression
drivers/ata/pata_falcon.c:58:41: warning: incorrect type in argument 1 (different address spaces)
drivers/ata/pata_falcon.c:58:41:    expected unsigned short volatile [noderef] [usertype] __iomem *port
drivers/ata/pata_falcon.c:58:41:    got unsigned short [usertype] *

The same thing shows up in 8 places, all told. Avoid this by removing
unnecessary type casts.

Cc: Jens Axboe <axboe@kernel.dk>
Cc: Michael Schmitz <schmitzmic@gmail.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Reported-by: Nkernel test robot <lkp@intel.com>
Suggested-by: NGeert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: NFinn Thain <fthain@linux-m68k.org>
Reviewed-by: NGeert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: NDamien Le Moal <damien.lemoal@opensource.wdc.com>

drivers/ata/pata_falcon.c

@@ -55,14 +55,14 @@ static unsigned int pata_falcon_data_xfer(struct ata_queued_cmd *qc,
 	/* Transfer multiple of 2 bytes */
 	if (rw == READ) {
 		if (swap)
-			raw_insw_swapw((u16 *)data_addr, (u16 *)buf, words);
+			raw_insw_swapw(data_addr, (u16 *)buf, words);
 		else
-			raw_insw((u16 *)data_addr, (u16 *)buf, words);
+			raw_insw(data_addr, (u16 *)buf, words);
 	} else {
 		if (swap)
-			raw_outsw_swapw((u16 *)data_addr, (u16 *)buf, words);
+			raw_outsw_swapw(data_addr, (u16 *)buf, words);
 		else
-			raw_outsw((u16 *)data_addr, (u16 *)buf, words);
+			raw_outsw(data_addr, (u16 *)buf, words);
 	}
 
 	/* Transfer trailing byte, if any. */
@@ -74,16 +74,16 @@ static unsigned int pata_falcon_data_xfer(struct ata_queued_cmd *qc,
 
 		if (rw == READ) {
 			if (swap)
-				raw_insw_swapw((u16 *)data_addr, (u16 *)pad, 1);
+				raw_insw_swapw(data_addr, (u16 *)pad, 1);
 			else
-				raw_insw((u16 *)data_addr, (u16 *)pad, 1);
+				raw_insw(data_addr, (u16 *)pad, 1);
 			*buf = pad[0];
 		} else {
 			pad[0] = *buf;
 			if (swap)
-				raw_outsw_swapw((u16 *)data_addr, (u16 *)pad, 1);
+				raw_outsw_swapw(data_addr, (u16 *)pad, 1);
 			else
-				raw_outsw((u16 *)data_addr, (u16 *)pad, 1);
+				raw_outsw(data_addr, (u16 *)pad, 1);
 		}
 		words++;
 	}