st/xvmc: consolidate C sources list into Makefile.sources

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Tom Stellard <thomas.stellard@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>

src/gallium/state_trackers/xvmc/Makefile.am

@@ -20,6 +20,7 @@
 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 # DEALINGS IN THE SOFTWARE.
 
+include Makefile.sources
 include $(top_srcdir)/src/gallium/Automake.inc
 
 AM_CFLAGS = \
@@ -28,12 +29,7 @@ AM_CFLAGS = \
 
 noinst_LTLIBRARIES = libxvmctracker.la
 
-libxvmctracker_la_SOURCES = \
-	block.c \
-	surface.c \
-	context.c \
-	subpicture.c \
-	attributes.c
+libxvmctracker_la_SOURCES = $(C_SOURCES)
 
 check_PROGRAMS = \
 	tests/test_context \

src/gallium/state_trackers/xvmc/Makefile.sources

@@ -0,0 +1,6 @@
+C_SOURCES := \
+	block.c \
+	surface.c \
+	context.c \
+	subpicture.c \
+	attributes.c