MLK-14394 i2c: imx-lpi2c: change default bitrate

Due to the eviation i2c clk settings, the result may less than
100KBps. As a result, some i2c slave works in wrong condition.

This patch changes i2c bitrate to 200KBps

Signed-off-by: Gao Pan <pandy.gao@nxp.com>
Signed-off-by: Vipul Kumar <vipul_kumar@mentor.com>