console/dummy: leave .con_font_get set to NULL

When this method is set, the caller expects struct console_font fields
to be properly initialized when it returns. Leave it unset otherwise
nonsensical (leaked kernel stack) values are returned to user space.
Signed-off-by: NNicolas Pitre <nico@linaro.org>
Cc: stable@vger.kernel.org
Signed-off-by: NBartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>

drivers/video/console/dummycon.c

@@ -67,7 +67,6 @@ const struct consw dummy_con = {
     .con_switch =	DUMMY,
     .con_blank =	DUMMY,
     .con_font_set =	DUMMY,
-    .con_font_get =	DUMMY,
     .con_font_default =	DUMMY,
     .con_font_copy =	DUMMY,
 };