buildroot to build toolchain on Linux

HI dumdan,

You are very close to sucess.

1. start with minimal kernel config, (copy kernel2.config to .config).

2. check if you have network support and your opencore emac / tdk phy in kernel menuconfig, better compile-in kernel, instead of modules.

ie, minimal config + network + emac + phy

3. cfi, mtd,ramdisk,and kernel command line are not required in kernel config, because we use initramfs.

4. boot uclinux, and check if the eth0 init sucessfully.