linux-raspberrypi: add linux-raspberrypi_%.bbappend and set version 5.10

Currently kernel configs and patches are applied only to linux-yocto.
Adding linux-raspberrypi_%.bbappend to apply openharmony kernel patches
also to linux-raspberrypi kernel.

Set linux-raspberrypi preferred kernel version to 5.10 to align with linux-yocto
version. This allows `driver-add-hilog-and-hievent-buffer-management-drive.patch`
to be correctly applied.

Signed-off-by: Francesco Pham <francesco.pham@huawei.com>

conf/distro/oniro-openharmony-linux.conf

@@ -29,6 +29,7 @@ INIT_MANAGER = "systemd"
 
 # Linux kernel version
 PREFERRED_VERSION_linux-yocto = "5.10.%"
+PREFERRED_VERSION_linux-raspberrypi = "5.10.%"
 
 # Attempt to isolate the buidl system from the host distribution's C library
 require conf/distro/include/yocto-uninative.inc

recipes-kernel/linux/linux-raspberrypi_%.bbappend

+# SPDX-FileCopyrightText: Huawei Inc.
+#
+# SPDX-License-Identifier: Apache-2.0
+
+require openharmony.inc