Update the LEON2/3 serial driver to make use of the readl and writel
macros as well as the WATCHDOG_RESET() macro.
Add readl/writel and friends to the asm/io.h file.
Introduce the gd->arch.uart variable to store register address.
Lastly, remove baudrate scaler macro variables from board config. It
is now calculated in the serial driver using the global data variable.
Signed-off-by: Francois Retief <fgretief@spaceteq.co.za>
The change is currently needed to be able to remove the board
configuration scripting from the top level Makefile and replace it by
a simple, table driven script.
Moving this configuration setting into the "CONFIG_*" name space is
also desirable because it is needed if we ever should move forward to
a Kconfig driven configuration system.
Signed-off-by: Wolfgang Denk <wd@denx.de>