ENGR00154436-2 - MXC HDMI: Support complete feature set

ENGR00154436-2 - MXC HDMI: Support complete feature set

- Cleaned up video mode configuration in HDMI driver
- Add support for configurable ipu-to-hdmi mappings
- Add hotplug support.
- Adapt interrupt handling to account for sharing interrupt with HDMI audio
- Remove audio configuration
- Change code to only use CEA HDMI modes
- Add support for AVI InfoFrame
- Add aspect ratio to EDID mode data
- Add rounding support to IPU pix clk setup
- Add powerdown/powerup flow
- Support FB notifications
- Remove build warnings

Signed-off-by: Danny Nold <dannynold@freescale.com>