soc: arm: nxp_imx: r5xx: add clock initialization for MIPI and LCDIF

Add clock initialization for MIPI and LCIDF to NXP RT5xx SOC.
Note that clock divider properties are used by both initialization
routines, as the required clock divider will vary depending on
attached display.

Signed-off-by: Daniel DeGrasse <daniel.degrasse@nxp.com>