ODROID-C5: logo: Add Hardkernel boot logo

- Delete load_bmp_logo in env
- Osd, htmitx initialization moved from env to board init
- Add command showlogo
- Increase CONFIG_VIDEO_LOGO_MAX_SIZE
- Tested: 1080p, 2160p, vu12
TODO:
- HDMI initialization process depending on boot mode (cold, warm)
- Get boot partition
- bestmode

Signed-off-by: YoungSoo Shin <shinys000114@gmail.com>
Change-Id: I558d36a30257f9a55b0d6f131752d74151e84294
5 files changed