Make pasemi_mac.c depend on PPC_PASEMI to prevent link errors

drivers/net/pasemi_mac.c is enabled by CONFIG_PASEMI_MAC, which depends on
PPC64 && PCI. However pasemi_mac.c uses several routines that are only
built when PPC_PASEMI is selected. This can lead to an unbuildable config:

 ERROR: ".pasemi_dma_start_chan" [drivers/net/pasemi_mac.ko] undefined!

So make CONFIG_PASEMI_MAC depend on PPC_PASEMI instead of PPC64.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

drivers/net/Kconfig

@@ -2635,7 +2635,7 @@ config NIU
 
 config PASEMI_MAC
 	tristate "PA Semi 1/10Gbit MAC"
-	depends on PPC64 && PCI
+	depends on PPC_PASEMI && PCI
 	select PHYLIB
 	select INET_LRO
 	help