configs:minnowboard_max-graphical_defconfig: re-enable GLX support
This defconfig loses mesa3d-demo and glmark2 package since commit
5cb821d5635626b7327d5d704555c412e5ed5a1f that introduced an
explicit option to enable GLX support.
This fixes the new defconfig check.
Signed-off-by: Romain Naour <romain.naour@gmail.com>
Cc: Peter Korsgaard <peter@korsgaard.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>