ARM: omap2plus_defconfig: Update for removed items

The omap panel-dpi driver was removed in
Commit 8bf4b162 ("drm/omap: Remove panel-dpi driver")

The tFP410 and DVI connector was remove in
Commit be3143d8 ("drm/omap: Remove TFP410 and DVI connector drivers")

This patch removes these items from the omap2plus_defconfig.

Signed-off-by: Adam Ford <aford173@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>