Correct the base address of the Realtek RTL8019AS chip on the Toshiba RBTX4938
board -- this should make the driver work at least when CONFIG_PCI is enabled.

Signed-off-by: Yuri Shpilevsky <yshpilevsky@ru.mvista.com>
Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>