Revision B of the board uses CSD0 for the DRAM,
as usual for MX3 boards. The patch fixes also
some values in the U-Boot environment.

Signed-off-by: Stefano Babic <sbabic@denx.de>

The serial driver for iMX SOCs is continuosly changed if a
new SOC or not yet used port is used. CONFIG_SYS_<SOC>_<UART Port>
defines were used only to find the base address for the selected UART.
Instead of that, move the base address to the board configuration
file and drop all #ifdef from driver.

Signed-off-by: Stefano Babic <sbabic@denx.de>
CC: Marek Vasut <marek.vasut@gmail.com>
CC: Wolfgang Denk <wd@denx.de>
CC: Fabio Estevam <fabio.estevam@freescale.com>
CC: Helmut Raiger <helmut.raiger@hale.at>
CC: John Rigby <jcrigby@gmail.com>
CC: Matthias Weisser <weisserm@arcor.de>
CC: Jason Liu <jason.hui@linaro.org>
Acked-by: Jason Liu <jason.hui@linaro.org>

The flea3 board is a custom board by CarMediaLab used
in automotive.
Network (FEC), NOR, NAND and SPI are supported.

Signed-off-by: Stefano Babic <sbabic@denx.de>