[meta-virtualization][PATCH 4/8] xen, rpi4: switch Xen-on-Rpi4 kernel preference to linux-yocto

["Christopher Clark" <christopher.w.clark@gmail.com>]

The 5.10 version of the Linux Yocto kernel supports running Xen on the
Raspberry Pi 4, so the previous preference for linux-yocto-dev can be
replaced.

Use the ?= operator to set the kernel preference now since
meta-raspberrypi commit e0b4b8c5d introduced use of the weak default
for kernel preference in that layer to allow this here.

KERNEL_DEVICETREE needs to be set to match the build outputs of the
selected kernel, in this case: "broadcom/bcm2711-rpi-4-b.dtb"

Tested with kernel version:
 SRCREV_machine = "cf5b0320cf4544d3db9ce3ddd6ddb7553a610651"
 SRCREV_meta="031f6c76e488a3563f35258c72ff1de3e25a512e"

Signed-off-by: Christopher Clark <christopher.w.clark@gmail.com>
---
 conf/distro/include/meta-virt-xen.inc | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/conf/distro/include/meta-virt-xen.inc b/conf/distro/include/meta-virt-xen.inc
index 44853d9..584cd6e 100644
--- a/conf/distro/include/meta-virt-xen.inc
+++ b/conf/distro/include/meta-virt-xen.inc
@@ -20,4 +20,5 @@ RPI_EXTRA_CONFIG_append_raspberrypi4-64  = "\nenable_gic=1"
 # Increase boot partition for space for kernel and Xen
 BOOT_SPACE_raspberrypi4-64 = "61440"
 # Override the meta-raspberrypi default kernel preference
-PREFERRED_PROVIDER_virtual/kernel_raspberrypi4-64 = "linux-yocto-dev"
+PREFERRED_PROVIDER_virtual/kernel_raspberrypi4-64 ?= "linux-yocto"
+KERNEL_DEVICETREE_raspberrypi4-64 ?= "broadcom/bcm2711-rpi-4-b.dtb"
-- 
2.25.1