defconfigs: Drop FB_UDL from all Pi defconfigs
CONFIG_FB_UBL is the fbdev driver for DisplayLink USB displays.
CONFIG_UDL is the DRM driver for DisplayLink USB displays.
Both attach themselves to the same USB device alias, so both
get loaded for any attached display. You now have 2 drivers for
the same hardware, and a race as to which one will load.
DRM emulates the framebuffer interface, so disable the fbdev
driver.
https://github.com/raspberrypi/bookworm-feedback/issues/133
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>