webos: webos-raspberrypi: linux-raspberrypi=v6.1.77

:Release Notes:

:Detailed Notes:
There is recipes-kernel/linux/linux-raspberrypi_6.1.bb recipe in
meta-raspberrypi/kirkstone which was backported to support raspberrypi5
which we can switch to by setting PREFERRED_VERSION_linux-raspberrypi
(all rpis use 6.1 since mickledore and 6.6 since scarthgap).

rpi-6.1.y has these changes as well:

BUILD/work-shared/raspberrypi4-64/kernel-source $ git log rpi-6.1.y --oneline net/wireless/certs/wens.hex
db57ef0dd4c2 wifi: cfg80211: fix certs build to not depend on file order
ec350809cd98 wifi: cfg80211: Add my certificate

but only since 6.1.74 (not 6.1.61 currently used in meta-raspberrypi/kirkstone),
so backport newer 6.1 from:
agherzan/meta-raspberrypi#1317 [kirkstone] linux-raspberrypi_6.1.bb: Upgrade to 6.1.77
agherzan/meta-raspberrypi#1319 [mickledore] linux-raspberrypi_6.1.bb: Upgrade to 6.1.77
agherzan/meta-raspberrypi#1318 [nanbield] linux-raspberrypi_6.1.bb: Upgrade to 6.1.77
agherzan/meta-raspberrypi#1320 [scarthgap] linux-raspberrypi: Drop 5.15

This can be dropped once the above PRs are merged upstream and weboslayers.py updated
but it would be useful to keep for langdale compatibility
as meta-raspberrypi/langdale doesn't have 6.1 recipe at all
and it would break the bisect-ability of yocto upgrade chain

:Testing Performed:
Only build tested.

:QA Notes:
No change to image.

:Issues Addressed:
[WRQ-20169] CCC: webos-raspberrypi: linux-raspberrypi=v6.1.77
[WRQ-20759] iw reg set doesn't work
[WRQ-16273] [TAS Failed][OSE][QWAPI-3045] com.webos.service.wifi: getCountryCode
[WRQ-693] Create GPVB with Yocto 4.2 Mickledore

Cherry-picked-from-commit: d970a5ef9ae1c22fdd22ec06553e8fb029036454
Cherry-picked-from-branch:

meta-webos-raspberrypi/conf/machine/include/webos-rpi.inc

@@ -99,3 +99,16 @@ WKS_FILE = "sdimage-raspberrypi-webos.wks"
 
 # Use Fake KMS until surface-manager is fixed to support Full KMS, see WRP-5
 VC4DTBO = "vc4-fkms-v3d"
+
+# overwrite 5.15 used for rpi3 and rpi4 MACHINEs in kirkstone:
+# conf/machine/include/rpi-default-versions.inc:PREFERRED_VERSION_linux-raspberrypi ??= "5.15.%"
+# conf/machine/raspberrypi5.conf:PREFERRED_VERSION_linux-raspberrypi = "6.1%"
+# all rpi MACHINEs use 6.1 since mickledore and 6.6 since scarthgap (keep in mind that this won't work in langdale)
+# See meta-raspberrypi/recipes-kernel/linux/linux-raspberrypi_6.1.bb
+# 6.1.61 (backported to kirkstone for rpi5), no 6.1 in langdale, 6.1.54 mickledore, 6.1.61 nanbield, 6.1.77 scarthgap
+# and meta-webos-backports/meta-webos-backports-5.0/dynamic-layers/raspberrypi/recipes-kernel/linux/linux-raspberrypi_6.1.bb
+# 6.1.77 backported from scarthgap for all releases (the same backports send upstream, except for long dead langdale)
+# For scarthgap see meta-raspberrypi/recipes-kernel/linux/linux-raspberrypi_6.6.bb
+# 6.6.22 scarthgap (uses this one by default)
+# Be aware that meta-webos-backports-5.0 has lower priority (34) than meta-raspberrypi (50) in our weboslayers.py
+PREFERRED_VERSION_linux-raspberrypi = "6.1.77%"