[RND-2329] psplash: Disable startup message

The psplash application enables a startup message by default, which creates
a white strip on the boot splash image as a background for the message.
Variscite's splash image already has a white background, so the white strip
goes unnoticed in this case.

Disable the startup message to avoid displaying a white strip on the screen.

Signed-off-by: Alifer Moraes <alifer.m@variscite.com>

recipes-core/psplash/psplash_git.bbappend

@@ -5,6 +5,8 @@ SRC_URI:append = " \
 "
 SPLASH_IMAGES = "file://psplash-poky.png;outsuffix=default"
 
+CFLAGS:append = " -DPSPLASH_DISABLE_STARTUP_MSG"
+
 do_configure:prepend() {
 	cp ${WORKDIR}/*.png ${S}/base-images
 }