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/mx28evk_nand_defconfig b/configs/mx28evk_nand_defconfig
index a75570c..7d95b8f 100644
--- a/configs/mx28evk_nand_defconfig
+++ b/configs/mx28evk_nand_defconfig
@@ -60,4 +60,5 @@
 CONFIG_VIDEO=y
 CONFIG_SPLASH_SCREEN=y
 CONFIG_VIDEO_BMP_GZIP=y
+CONFIG_VIDEO_BMP_RLE8=y
 CONFIG_OF_LIBFDT=y