[U-Boot] PATCH 0/8 Multi-adapter multi-bus I2C

[ksi at koi8.net]

This is the first attempt of multi-adapter multi-bus I2C subsystem rework
for U-Boot.

This batch deals with fsl_i2c and soft_i2c drivers. All (hopefully :)
relevant parts are changed -- config files for all boards affected, lib_xxx,
board/* etc.

Please see illustrative section of MPC8548CDS.h config file for an example
for 2 soft_i2c, 2 fsl_i2c, 1 sm502_i2c adapters and 7 busses some of them
connected via I2C multiplexers.

All comments, suggestions etc. are very welcome.

I'm going to move _ALL_ I2C drivers to drivers/i2c and rework all the
configs and other relevant stuff in next batches. Then I will do another run
to completely remove CONFIG_NEW_I2C and get rid of CONFIG_HARD_I2C.

The patches are in next 8 emails.

Signed-off-by: Sergey Kubushyn <ksi at koi8.net>

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