Convert CONFIG_CMD_BMP to Kconfig

This converts the following to Kconfig:
   CONFIG_CMD_BMP

Signed-off-by: Simon Glass <sjg@chromium.org>
[trini: Add depends on LCD || DM_VIDEO || VIDEO]
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/sandbox_spl_defconfig b/configs/sandbox_spl_defconfig
index ffdd15b..e0ee8c2 100644
--- a/configs/sandbox_spl_defconfig
+++ b/configs/sandbox_spl_defconfig
@@ -49,6 +49,7 @@
 CONFIG_CMD_SNTP=y
 CONFIG_CMD_DNS=y
 CONFIG_CMD_LINK_LOCAL=y
+CONFIG_CMD_BMP=y
 CONFIG_CMD_TIME=y
 CONFIG_CMD_TIMER=y
 CONFIG_CMD_SOUND=y