configs: sandbox64: Enable video 16bpp and 24bpp support

Align the sandbox64 defconfig with sandbox defconfig. Enable missing
16bpp and 24bpp video support. This fixes ut_dm_dm_test_video_bmp16
and ut_dm_dm_test_video_bmp24 tests .

Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/configs/sandbox64_defconfig b/configs/sandbox64_defconfig
index 4612d4f..7d00282 100644
--- a/configs/sandbox64_defconfig
+++ b/configs/sandbox64_defconfig
@@ -244,6 +244,8 @@
 CONFIG_VIDEO_SANDBOX_SDL=y
 CONFIG_OSD=y
 CONFIG_SANDBOX_OSD=y
+CONFIG_BMP_16BPP=y
+CONFIG_BMP_24BPP=y
 # CONFIG_WATCHDOG_AUTOSTART is not set
 CONFIG_WDT=y
 CONFIG_WDT_GPIO=y