ne: MIPS: Use platform_driver for ne on RBTX49XX

This patch lets RBTX49XX boards use generic platform_driver interface
for the ne driver.

* Use platform_device to pass ioaddr and irq to the ne driver.
* Remove unnecessary ifdefs for RBTX49XX from the ne driver.
* Make the ne driver selectable on these boards regardless of CONFIG_ISA

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
index 279ec62..372f257 100644
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -1104,7 +1104,7 @@
 
 config NE2000
 	tristate "NE2000/NE1000 support"
-	depends on NET_ISA || (Q40 && m) || M32R
+	depends on NET_ISA || (Q40 && m) || M32R || TOSHIBA_RBTX4927 || TOSHIBA_RBTX4938
 	select CRC32
 	---help---
 	  If you have a network (Ethernet) card of this type, say Y and read