MLK-13945-1: ASoC: fsl_mqs: refine the mqs driver for support imx8qm

IOMUXC_GPR2 register is not used for imx8, there is a new register
designed for this usage in imx8, so it also need the ipg clock.

Signed-off-by: Shengjiu Wang <shengjiu.wang@freescale.com>
Reviewed-by: Daniel Baluta <daniel.baluta@nxp.com>
(Fixed merge conflicts)
TODO: checkpatch warnings
Signed-off-by: Vipul Kumar <vipul_kumar@mentor.com>
Signed-off-by: Srikanth Krishnakar <Srikanth_Krishnakar@mentor.com>