arm,arm-bsp/recipes-kernel: don't use PN in arm-ffa-transport.inc

There are some cases where PN is not expanded into linux-yocto in the
arm-ffa-transport.inc file required from linux-yocto_%.bbappend,
because of the := usage, in those cases PN gets "defaultpkgname".

To fix the issue, rename "linux-yocto" folder into "files" and adjust
ARMFILESPATHS to point to that in linux-yocto_%.bbappend, prepend
ARMFILESPATHS to FILESEXTRAPATHS in arm-ffa-transport.inc.

Remove ARMFILESPATHS prepend from FILESEXTRAPATHS for corstone1000 in
meta-arm-bsp, because the platform has always the "arm-ffa" in
MACHINE_FEATURES, which causes ARMFILESPATHS to be prepended.

While there, remove the FILESEXTRAPATHS prepend of ARMFILESPATHS for
the n1sdp that will be added by arm-ffa-transport.inc only when
needed.

Signed-off-by: Luca Fancellu <luca.fancellu@arm.com>
Signed-off-by: Jon Mason <jon.mason@arm.com>

meta-arm-bsp/recipes-kernel/linux/linux-arm-platforms.inc

@@ -36,7 +36,6 @@ SRC_URI:append:corstone500 = " \
 # Corstone1000 KMACHINE
 #
 FILESEXTRAPATHS:prepend:corstone1000 := "${ARMBSPFILESPATHS}"
-FILESEXTRAPATHS:prepend:corstone1000 := "${ARMFILESPATHS}"
 COMPATIBLE_MACHINE:corstone1000 = "${MACHINE}"
 KCONFIG_MODE:corstone1000 = "--alldefconfig"
 KMACHINE:corstone1000 = "corstone1000"
@@ -115,7 +114,6 @@ COMPATIBLE_MACHINE:n1sdp = "n1sdp"
 KBUILD_DEFCONFIG:n1sdp = "defconfig"
 KCONFIG_MODE:n1sdp = "--alldefconfig"
 FILESEXTRAPATHS:prepend:n1sdp := "${ARMBSPFILESPATHS}"
-FILESEXTRAPATHS:prepend:n1sdp := "${ARMFILESPATHS}"
 SRC_URI:append:n1sdp = " \
     file://0001-iommu-arm-smmu-v3-workaround-for-ATC_INV_SIZE_ALL-in.patch \
     file://0002-n1sdp-pci_quirk-add-acs-override-for-PCI-devices.patch \

meta-arm/recipes-kernel/linux/arm-ffa-transport.inc

@@ -1,4 +1,4 @@
-FILESEXTRAPATHS:prepend := "${THISDIR}/${PN}:"
+FILESEXTRAPATHS:prepend := "${ARMFILESPATHS}"
 
 # Enable ARM-FFA transport
 SRC_URI:append = " \

meta-arm/recipes-kernel/linux/linux-yocto_%.bbappend

@@ -1,4 +1,4 @@
-ARMFILESPATHS := "${THISDIR}/${PN}:"
+ARMFILESPATHS := "${THISDIR}/files:"
 
 COMPATIBLE_MACHINE:generic-arm64 = "generic-arm64"
 FILESEXTRAPATHS:prepend:generic-arm64 = "${ARMFILESPATHS}"