linux-yocto: Add support for qemuarma7 machine

Signed-off-by: Esben Haabendal <esben.haabendal@huawei.com>

recipes-kernel/linux-yocto/linux-yocto_%.bbappend

@@ -8,3 +8,10 @@ SRC_URI:append:oniro-openharmony-linux = " file://ashmem.cfg"
 SRC_URI:append:oniro-openharmony-linux = " file://driver-add-hilog-and-hievent-buffer-management-drive.patch"
 SRC_URI:append:oniro-openharmony-linux = " file://driver-add-hilog-and-hievent-buffer-management-drive.cfg"
 SRC_URI:append:oniro-openharmony-linux = " file://android_binder_ipc.cfg"
+
+#
+# QEMU ARM Cortex-A7
+#
+COMPATIBLE_MACHINE:qemuarma7 = "qemuarma7"
+KBUILD_DEFCONFIG:qemuarma7 = "multi_v7_defconfig"
+KCONFIG_MODE:qemuarma7 = "--alldefconfig"