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/wtk_defconfig b/configs/wtk_defconfig
index 6b73178..d0c0136 100644
--- a/configs/wtk_defconfig
+++ b/configs/wtk_defconfig
@@ -10,6 +10,7 @@
 # CONFIG_CMD_SETEXPR is not set
 CONFIG_CMD_DHCP=y
 CONFIG_CMD_SNTP=y
+CONFIG_CMD_BMP=y
 CONFIG_CMD_EXT2=y
 CONFIG_MAC_PARTITION=y
 CONFIG_DOS_PARTITION=y