Adds a sunxi-cedrus-drv-video libVA backend

This VA backend uses v4l2's Frame API proposal to interface with the
"sunxi-cedrus" video driver on Allwinner SoC. Only a few parts of the
code are really dependent on sunxi-cedrus and this VA backend could be
reused for other v4l drivers using the Frame API.

src/Makefile.am

@@ -0,0 +1,40 @@
+AM_CPPFLAGS = \
+	-DPTHREADS		\
+	$(X11_DEPS_CFLAGS)\
+	$(DRM_CFLAGS)		\
+	$(LIBVA_DEPS_CFLAGS)
+
+driver_cflags = \
+	-Wall			\
+	-fvisibility=hidden
+
+driver_ldflags = \
+	-module -avoid-version	\
+	-no-undefined		\
+	-Wl,--no-undefined
+
+driver_libs = \
+	-lpthread -ldl		\
+	$(DRM_LIBS)		\
+	$(X11_DEPS_LIBS)	\
+	$(LIBVA_DEPS_LIBS)
+
+source_c = sunxi_cedrus_drv_video.c object_heap.c buffer.c va_config.c \
+	context.c image.c picture.c subpicture.c surface.c
+
+source_s = \
+	tiled_yuv.S
+
+source_h = sunxi_cedrus_drv_video.h object_heap.h buffer.h va_config.h \
+	context.h image.h picture.h subpicture.h surface.h \
+	tiled_yuv.h
+
+sunxi_cedrus_drv_video_la_LTLIBRARIES	= sunxi_cedrus_drv_video.la
+sunxi_cedrus_drv_video_ladir		= $(LIBVA_DRIVERS_PATH)
+sunxi_cedrus_drv_video_la_CFLAGS	= $(driver_cflags)
+sunxi_cedrus_drv_video_la_LDFLAGS	= $(driver_ldflags)
+sunxi_cedrus_drv_video_la_LIBADD	= $(driver_libs)
+sunxi_cedrus_drv_video_la_SOURCES	= $(source_c) $(source_s)
+noinst_HEADERS				= $(source_h)
+
+MAINTAINERCLEANFILES = Makefile.in config.h.in