Switch over to using the kernel *_drm.h headers instead of the copies

thereof provided with libdrm. This has been annoying me forever, and it
a blight caused by developing widely used drivers out of the kernel
tree.

ok matthieu@

lib/libGL/Makefile

@@ -1,4 +1,4 @@
-# $OpenBSD: Makefile,v 1.22 2009/01/10 16:04:43 oga Exp $
+# $OpenBSD: Makefile,v 1.23 2009/01/10 16:06:51 oga Exp $
 .include <bsd.xconf.mk>
 
 .if ${XENOCARA_BUILD_DRI:L} == "yes"
@@ -46,7 +46,7 @@ CPPFLAGS+= \
 	-I${MESA}/shader/slang \
 	-I${GLX} \
 	-I${X11BASE}/include \
-	-I${X11BASE}/include/drm \
+	-I/usr/include/dev/pci/drm \
 	-DGLX_INDIRECT_RENDERING \
 	-DPTHREADS \
 	-DHAVE_ALIAS \

lib/libGL/dri/Makefile.inc

@@ -1,4 +1,4 @@
-# $OpenBSD: Makefile.inc,v 1.7 2008/11/02 15:01:32 matthieu Exp $
+# $OpenBSD: Makefile.inc,v 1.8 2009/01/10 16:06:51 oga Exp $
 .include <bsd.xconf.mk>
 
 MESA= ${.CURDIR}/../../../../dist/Mesa/src/mesa
@@ -35,7 +35,7 @@ INCLUDES = \
 	-I$(TOP)/src/egl/main \
 	-I$(TOP)/src/egl/drivers/dri \
 	-I$(X11BASE)/include \
-	-I$(X11BASE)/include/drm
+	-I/usr/include/dev/pci/drm
 
 .if ${MACHINE_ARCH} == "i386"
 CPPFLAGS += \

lib/libGL/libmesa/Makefile

@@ -1,4 +1,4 @@
-# $OpenBSD: Makefile,v 1.6 2008/11/05 07:18:26 todd Exp $
+# $OpenBSD: Makefile,v 1.7 2009/01/10 16:06:51 oga Exp $
 
 MESA=	${.CURDIR}/../../../dist/Mesa/src/mesa
 MESA_INCLUDE=	${.CURDIR}/../../../dist/Mesa/include
@@ -18,7 +18,7 @@ CPPFLAGS+= \
 	-I${MESA}/shader/grammar \
 	-I${MESA}/shader/slang \
 	-I${X11BASE}/include \
-	-I${X11BASE}/include/drm \
+	-I/usr/include/dev/pci/drm \
 	-DGLX_INDIRECT_RENDERING \
 	-DGLX_DIRECT_RENDERING \
 	-DUSE_EXTERNAL_DXTN_LIB=1 \