The i2c driver contains a while loop that has no timeout.  If i2c is in a
funky state and OMAP_I2C_CON_STT remains asserted, the kernel hangs.  Insert
the standard i2c timeout into the loop.
Signed-off-by: Jason P Marini <jason.marini@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>