configs: migrate CONFIG_VIDEO_BMP_RLE8 to defconfigs

Done with:
./tools/moveconfig.py VIDEO_BMP_RLE8

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/configs/cm_fx6_defconfig b/configs/cm_fx6_defconfig
index 3ce28a8..654a4fc 100644
--- a/configs/cm_fx6_defconfig
+++ b/configs/cm_fx6_defconfig
@@ -97,4 +97,5 @@
 CONFIG_VIDEO_IPUV3=y
 CONFIG_SPLASH_SCREEN=y
 CONFIG_SPLASH_SOURCE=y
+CONFIG_VIDEO_BMP_RLE8=y
 CONFIG_FDT_FIXUP_PARTITIONS=y