sparc: Move SBUS DMA attribute interfaces out of asm/sbus.h

This is in preparation for the subsequent asm/sbus.h removal.

Also, make these routines take a "struct device" or no
arguments, as appropriate.

Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/myri_sbus.c b/drivers/net/myri_sbus.c
index 858880b..f2a3ff2 100644
--- a/drivers/net/myri_sbus.c
+++ b/drivers/net/myri_sbus.c
@@ -1050,7 +1050,7 @@
 	mp->myri_bursts = prom_getintdefault(mp->myri_sdev->bus->prom_node,
 					     "burst-sizes", 0x00);
 
-	if (!sbus_can_burst64(sdev))
+	if (!sbus_can_burst64())
 		mp->myri_bursts &= ~(DMA_BURST64);
 
 	DET(("MYRI bursts %02x\n", mp->myri_bursts));