[PATCH] MPC52xxx I2C: make algo use of I2C_RSTA

[Bertrand BAUDET]

This patch makes use of I2C RESTART sequence when sending severals i2c_msg
instead of the STOP and START sequence.

Some I2C component reset there internal values when a STOP is sent.
(like the Ricoh rs5c372b I2C RTC)

Patch is against DENX linuxppc CVS

Regards,
Bertrand
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