Now that we've branched, turn off building DRM and DRM2 by default.

We no longer build the drm/drm2 modules by default. See UPDATING for
which package to install instead. drm and drm2 have been completely
unsupported abandonware for a long time now. Please report issues with
the pkg modules to x11@freebsd.org.

Approved by: FreeBSD Graphics Team

sys/conf/kern.opts.mk

@@ -38,8 +38,6 @@ __DEFAULT_YES_OPTIONS = \
     IPSEC_SUPPORT \
     ISCSI \
     KERNEL_SYMBOLS \
-    MODULE_DRM \
-    MODULE_DRM2 \
     NETGRAPH \
     PF \
     REPRODUCIBLE_BUILD \
@@ -52,6 +50,8 @@ __DEFAULT_YES_OPTIONS = \
 __DEFAULT_NO_OPTIONS = \
     EXTRA_TCP_STACKS \
     KERNEL_RETPOLINE \
+    MODULE_DRM \
+    MODULE_DRM2 \
     NAND \
     OFED \
     RATELIMIT