Fixes build problems with the r200, radeon drivers.
NOTE: This is a candidate for the 8.0 branch.
NOUVEAU_LIBS = $(shell $(PKG_CONFIG) --libs libdrm_nouveau)
NOUVEAU_CFLAGS = $(shell $(PKG_CONFIG) --cflags libdrm_nouveau)
-LIBDRM_RADEON_LIBS = $(shell $(PKG_CONFIG) --libs libdrm_radeon)
-LIBDRM_RADEON_CFLAGS = $(shell $(PKG_CONFIG) --cflags libdrm_radeon)
-RADEON_CFLAGS = "-DHAVE_LIBDRM_RADEON=1 $(LIBDRM_RADEON_CFLAGS)"
+RADEON_LIBS = $(shell $(PKG_CONFIG) --libs libdrm_radeon)
+RADEON_CFLAGS = $(shell $(PKG_CONFIG) --cflags libdrm_radeon)
RADEON_LDFLAGS = $(LIBDRM_RADEON_LIBS)