[netdrvr] ne: Use CONFIG_MACH_TX49XX

After some cleanups in arch/mips area, now MACH_TX49XX is selected for
both TOSHIBA_RBTX4927 and TOSHIBA_RBTX4938.  Fold these two conditions
to one.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
index 4b4cb2b..a5c141c 100644
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -1172,7 +1172,7 @@
 
 config NE2000
 	tristate "NE2000/NE1000 support"
-	depends on NET_ISA || (Q40 && m) || M32R || TOSHIBA_RBTX4927 || TOSHIBA_RBTX4938
+	depends on NET_ISA || (Q40 && m) || M32R || MACH_TX49XX
 	select CRC32
 	---help---
 	  If you have a network (Ethernet) card of this type, say Y and read