This removes all boot messages but leave logo. For Plymouth configuration proceed here:

https://forum.armbian.com/topic/10087-armbian-boot-splash-screen/?do=findComment&comment=96114

diff --git a/include/configs/sunxi-common.h b/include/configs/sunxi-common.h
--- a/include/configs/sunxi-common.h
+++ b/include/configs/sunxi-common.h
@@ -438,12 +438,12 @@

 #ifdef CONFIG_VIDEO
 #define CONSOLE_STDOUT_SETTINGS \
-	"stdout=serial,vga\0" \
-	"stderr=serial,vga\0"
+	"stdout=serial\0" \
+	"stderr=serial\0"
 #elif CONFIG_DM_VIDEO
 #define CONSOLE_STDOUT_SETTINGS \
-	"stdout=serial,vidconsole\0" \
-	"stderr=serial,vidconsole\0"
+	"stdout=serial\0" \
+	"stderr=serial\0"
 #else
 #define CONSOLE_STDOUT_SETTINGS \
 	"stdout=serial\0" \