drm: zynq_drm: Fix compilation warnings

Remove unused variables and a define

Signed-off-by: hyun woo kwon <hyunk@xilinx.com>
drm: zynq_drm: crtc: Keep cresample/rgb2yuv turned on

Remove reset/enable/disable cresample and rgb2yuv in dpms().
Instead, enable those in initialization, and make them stay on.

Signed-off-by: hyun woo kwon <hyunk@xilinx.com>
drm: zynq_drm: encoder: Leave vtc turned on

Enable vtc in initialization and keep it on

Signed-off-by: hyun woo kwon <hyunk@xilinx.com>
drm: zynq_drm: crtc: Add commit() to mode_set_base()

Add commit() to mode_set_base() otherwise the change of framebuffer
address is not applied to vdma properly.

Signed-off-by: hyun woo kwon <hyunk@xilinx.com>
drm: zynq_drm: drv: Call hotplug_event() in load()

Add to call drm_fbdev_cma_hotplug_event() in zynq_drm_load().
This makes fbcon to show up quicker because it intentionally calls
to detect display connection. It doesn't wait to be polled to
detect the connection in initialization.

Signed-off-by: hyun woo kwon <hyunk@xilinx.com>
drm: zynq_drm: cresample: Change to frame sync reset

Change to frame sync reset + remove intrrupt disabling since it is
disabled as default values.

Signed-off-by: hyun woo kwon <hyunk@xilinx.com>
drm: zynq_drm: rgb2yuv: Change to frame sync reset

Change to use reset synchronized with fsync + remove interrupt
disable as it is disabled as default values.

Signed-off-by: hyun woo kwon <hyunk@xilinx.com>
drm: zynq_drm: vtc: Change to fsync reset

Change to use reset synchronized with fsync.

Signed-off-by: hyun woo kwon <hyunk@xilinx.com>
drm: zynq_drm: Add some information logs

This adds some information logs such as size, clock, and
transition in dpms.

Signed-off-by: hyun woo kwon <hyunk@xilinx.com>