ibm-ethernet: delete stale MCA and duplicate PSERIES dependency

MCA support has been removed but this dependency escaped removal.
Also, there is a duplicate PPC_PSERIES dependency that appeared
when the ethernet drivers were separated into vendor/model
specific directories, so we remove that here as well.
Reported-by: NRobert de Rooy <robert.de.rooy@gmail.com>
Signed-off-by: NPaul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/ibm/Kconfig

@@ -5,8 +5,7 @@
 config NET_VENDOR_IBM
 	bool "IBM devices"
 	default y
-	depends on MCA || PPC_PSERIES || PPC_PSERIES || PPC_DCR || \
-		   (IBMEBUS && SPARSEMEM)
+	depends on PPC_PSERIES || PPC_DCR || (IBMEBUS && SPARSEMEM)
 	---help---
 	  If you have a network (Ethernet) card belonging to this class, say Y
 	  and read the Ethernet-HOWTO, available from