configs: migrate CONFIG_BMP_16/24/32BPP to defconfigs

Done with:
./tools/moveconfig.py BMP_16BPP BMP_24BPP BMP_32BPP

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/configs/theadorable-x86-dfi-bt700_defconfig b/configs/theadorable-x86-dfi-bt700_defconfig
index 28a5f98..51aeaaf 100644
--- a/configs/theadorable-x86-dfi-bt700_defconfig
+++ b/configs/theadorable-x86-dfi-bt700_defconfig
@@ -63,4 +63,5 @@
 CONFIG_FRAMEBUFFER_SET_VESA_MODE=y
 CONFIG_FRAMEBUFFER_VESA_MODE_114=y
 CONFIG_CONSOLE_SCROLL_LINES=5
+CONFIG_BMP_16BPP=y
 # CONFIG_GZIP is not set