board/BuR: drop LCDC clock manipulation from board code

The clock selection is done now from the am335x-fb code, so there is no
more need doing this in the board code.

Signed-off-by: Hannes Schmelzer <oe5hpm@oevsv.at>
Reviewed-by: Anatolij Gustschin <agust@denx.de>
2 files changed