[U-Boot] 8xx serial, smc: add configurable SMC Rx buffer len

[Wolfgang Denk]

Dear Heiko Schocher,

In message <49913B73.2070502 at denx.de> you wrote:
> This patch adds the configuration option CONFIG_SYS_SMC_RXBUFLEN.
> With this option it is possible to allow the receive
> buffer for the SMC on 8xx to be greater then 1. In case
> CONFIG_SYS_SMC_RXBUFLEN == 1 this driver works as the
> old version.
> 
> When defining CONFIG_SYS_SMC_RXBUFLEN also
> CONFIG_SYS_MAXIDLE must be defined to setup the maximum
> idle timeout for the SMC.
> 
> Signed-off-by: Heiko Schocher <hs at denx.de>
> ---
>  README              |    2 +-
>  cpu/mpc8xx/serial.c |   94 +++++++++++++++++++++++++++++++--------------------
>  2 files changed, 58 insertions(+), 38 deletions(-)

Applied, thanks.

Best regards,

Wolfgang Denk

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