sparc: Kill now spurious includes of sbus.h

In order to make this week I also had to add an include
of linux/dma-mapping.h to asm/pci_32.h because drivers/pci/pci.c
really depends upon getting this header somehow.

Signed-off-by: David S. Miller <davem@davemloft.net>

arch/sparc/prom/ranges.c

@@ -9,7 +9,6 @@
 #include <asm/openprom.h>
 #include <asm/oplib.h>
 #include <asm/types.h>
-#include <asm/sbus.h>
 #include <asm/system.h>
 
 struct linux_prom_ranges promlib_obio_ranges[PROMREG_MAX];