linux-imx

drm: bridge: cadence: move struct imx_mhdp_device to drm/imx

move struct imx_mhdp_device to drm/imx folder.
change the base address name from regs to regs_base.
add mhdp bus access function.
uniform variable name.

Signed-off-by: Sandor Yu <Sandor.yu@nxp.com>