Add nosplash to command line

Signed-off-by: Fathi Boudra <fathi.boudra@linaro.org>
diff --git a/hwpacks/linaro-highbank b/hwpacks/linaro-highbank
index 92ca098..8b0dbe0 100644
--- a/hwpacks/linaro-highbank
+++ b/hwpacks/linaro-highbank
@@ -24,6 +24,7 @@
 boot_script: boot.scr
 extra_serial_options:
 - console=ttyAMA0,115200n8
+- nosplash
 assume_installed:
 - linaro-headless
 packages: