kern/49743: Unable to build RPI kernel for evbarm on 7.0-BETA branch with latest source

[dhgutteridge%sympatico.ca@localhost]

>Number:         49743
>Category:       kern
>Synopsis:       Unable to build RPI kernel for evbarm on 7.0-BETA branch with latest source
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Mar 12 02:20:00 +0000 2015
>Originator:     David H. Gutteridge
>Release:        7.0-BETA
>Organization:
>Environment:
NetBSD arcusiii.nonus-porta.net 5.2_STABLE NetBSD 5.2_STABLE (ARCUSIII) #2: Fri Sep  5 19:46:33 EDT 2014  disciple%arcusiii.nonus-porta.net@localhost:/home/disciple/netbsd-5/usr/src/sys/arch/i386/compile/obj/ARCUSIII i386

>Description:
After a fresh "cvs update -dP", I'm encountering this:

===> build.sh command:    ./build.sh -U -u -m evbarm -a earmv6hf -j 2 kernel=RPI
===> build.sh started:    Wed Mar 11 22:16:44 EDT 2015
===> NetBSD version:      7.0_BETA
===> MACHINE:             evbarm
===> MACHINE_ARCH:        earmv6hf
===> Build platform:      NetBSD 5.2_STABLE i386
===> HOST_SH:             /bin/sh
===> MAKECONF file:       /etc/mk.conf
===> TOOLDIR path:        /usr/builds/netbsd-7/src/obj/tooldir.NetBSD-5.2_STABLE-i386
===> DESTDIR path:        /usr/builds/netbsd-7/src/obj/destdir.evbarm
===> RELEASEDIR path:     /usr/builds/netbsd-7/src/obj/releasedir
===> Updated makewrapper: /usr/builds/netbsd-7/src/obj/tooldir.NetBSD-5.2_STABLE-i386/bin/nbmake-evbarm
===> Building kernel without building new tools
--- obj ---
===> Building kernel:     RPI
===> Build directory:     /usr/builds/netbsd-7/src/sys/arch/evbarm/compile/obj/RPI
/usr/builds/netbsd-7/src/sys/external/bsd/drm2/drm/files.drmkms:71: undefined attribute `genfb'
*** Stop.

>How-To-Repeat:
Try building an RPI kernel.
>Fix: