tnc: add new driver for the tunnelcreek pci host interface

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
crownbay: enable pci in the board configuration file

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
crownbay: increase u-boot image size to 1 MiB

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>