config: enable CMD_BMP when API+LCD is enabled

When both CONFIG_API and CONFIG_LCD are enabled, the API code calls
lcd_display_bitmap(). That isn't compiled unless either CONFIG_CMD_BMP
or CONFIG_SPLASH_SCREEN is enabled. In order to prevent build problems,
have config_fallbacks.h enable CONFIG_CMD_BMP when both API and LCD are
enabled.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

include/config_fallbacks.h

@@ -71,6 +71,10 @@
 #define CONFIG_LIB_RAND
 #endif
 
+#if defined(CONFIG_API) && defined(CONFIG_LCD)
+#define CONFIG_CMD_BMP
+#endif
+
 #ifndef CONFIG_SYS_PROMPT
 #define CONFIG_SYS_PROMPT	"=> "
 #endif