[U-Boot] fsl_i2c: increase I2C timeout values and make them configurable

[Timur Tabi]

Wolfgang Grandegger wrote:

> I did not follow the thread yet, sorry. I implemented AN2819 for Linux
> (see http://lxr.linux.no/#linux+v2.6.31/drivers/i2c/busses/i2c-mpc.c)
> some time ago using Timur's table approach. But there is no difference
> between the table and the algorithm to calculate the value. The table is
> actually derived from the same algorithm.

The problem with the table is that it does not allow for flexibility in choosing dfsr.  When I implemented the table code, I did not think that this was a problem, but apparently it is.

-- 
Timur Tabi
Linux kernel developer at Freescale