[cip-dev] [isar-cip-core][PATCH] linux: Fix warning if USE_CIP_KERNEL_CONFIG is not defined

USE_CIP_KERNEL_CONFIG may not be defined in all layers using the
isar-cip-core layer, so we end up with the following warnings:

WARNING: /work/cip-core/recipes-kernel/linux/linux-cip_4.19.140-cip33.bb: Unable to get checksum for linux-cip SRC_URI entry ${MACHINE}_defconfig: file could not be found
WARNING: /work/cip-core/recipes-kernel/linux/linux-cip-rt_4.4.231-cip47-rt30.bb: Unable to get checksum for linux-cip-rt SRC_URI entry ${MACHINE}_defconfig: file could not be found
WARNING: /work/cip-core/recipes-kernel/linux/linux-cip_4.4.230-cip47.bb: Unable to get checksum for linux-cip SRC_URI entry ${MACHINE}_defconfig: file could not be found
WARNING: /work/cip-core/recipes-kernel/linux/linux-cip-rt_4.19.135-cip31-rt13.bb: Unable to get checksum for linux-cip-rt SRC_URI entry ${MACHINE}_defconfig: file could not be found

${MACHINE}_defconfig needs to be added to SRC_URI only if
USE_CIP_KERNEL_CONFIG is set to "1".

There is one in-tree machine definition (the bbb) that does not set
USE_CIP_KERNEL_CONFIG to "1" but still needs the defconfig added.
A machine specific SRC_URI was set to take care of that.

Closes #7.

Signed-off-by: Florian Bezdeka <redacted>
---

Some additional notes:
  - That's my first contribution, so review carefully ;-)
  - Both branches (master, next) are affected
  - The gitlab MR: [1]
  - The gitlab issue: [2]

  [1]  https://gitlab.com/cip-project/cip-core/isar-cip-core/-/merge_requests/10
  [2]  https://gitlab.com/cip-project/cip-core/isar-cip-core/-/issues/7


 recipes-kernel/linux/linux-cip-common.inc | 15 ++++++---------
 1 file changed, 6 insertions(+), 9 deletions(-)

diff --git a/recipes-kernel/linux/linux-cip-common.inc b/recipes-kernel/linux/linux-cip-common.inc
index 6db1d1d..9aca9af 100644
--- a/recipes-kernel/linux/linux-cip-common.inc
+++ b/recipes-kernel/linux/linux-cip-common.inc

@@ -11,21 +11,18 @@
 
 KERNEL_DEFCONFIG ?= "${MACHINE}_defconfig"
 
-def conditional(variable, checkvalue, truevalue, falsevalue, d):
-    if d.getVar(variable) == checkvalue:
-        return truevalue
-    else:
-        return falsevalue
-
 require recipes-kernel/linux/linux-custom.inc
 
 SRC_URI += " \
     https://gitlab.com/cip-project/cip-kernel/linux-cip/-/archive/v${PV}/linux-cip-v${PV}.tar.gz \
     "
 
-SRC_URI_append = " ${@conditional("USE_CIP_KERNEL_CONFIG", "1", \
-    "git://gitlab.com/cip-project/cip-kernel/cip-kernel-config.git;protocol=https;destsuffix=cip-kernel-config;name=cip-kernel-config", \
-    "file://${KERNEL_DEFCONFIG}",d)}"
+SRC_URI_append = " ${@ "git://gitlab.com/cip-project/cip-kernel/cip-kernel-config.git;protocol=https;destsuffix=cip-kernel-config;name=cip-kernel-config" \
+    if d.getVar('USE_CIP_KERNEL_CONFIG') == '1' else '' \
+    }"
+
+SRC_URI_append_bbb = "file://${KERNEL_DEFCONFIG}"
+
 SRCREV_cip-kernel-config ?= "7f2930b9667372f94f2edb42ca9cf6fc6c0aed50"
 
 S = "${WORKDIR}/linux-cip-v${PV}"

-- 
2.29.2