linux-raspberrypi: Silence boot graphics

Disable the logo and the console cursor for a better UX in blueprints.

Signed-off-by: Andrei Gherzan <andrei.gherzan@huawei.com>

meta-oniro-blueprints/recipes-kernel/linux/linux-raspberrypi_%.bbappend

+# SPDX-FileCopyrightText: Huawei Inc.
+#
+# SPDX-License-Identifier: Apache-2.0
+
+FILESEXTRAPATHS_prepend := "${THISDIR}/linux:"
+
+SRC_URI += "file://blueprints-misc.cfg"
+
+# Silence the console cursor
+CMDLINE_append = " vt.global_cursor_default=0"

meta-oniro-blueprints/recipes-kernel/linux/linux/blueprints-misc.cfg

+# SPDX-FileCopyrightText: Huawei Inc.
+#
+# SPDX-License-Identifier: Apache-2.0
+
+CONFIG_LOGO=n