meta-qti-wlan: Adding variant to distinguish perf or debug WLAN module

In build_module.sh, the VARIANT always defaults to debug-defconfig,
regardless of whether the perf or debug variant is chosen for the
vendor build. As a result, a debug Module.symvers is generated for
WLAN module, and the debug CRC of the symbol module_layout is
captured in wlan.ko.

Therefore, if the device has a perf build image flashed and
CONFIG_MODVERSIONS is enabled, attempting to insmod WLAN module
will result in a CRC mismatch for the symbol module_layout, leading
to an insmod failure.

To fix the issue, we will pass build VARIENT information from
vendor build to build_modle.sh in recipe to distinguish perf or
debug WLAN module.

Change-Id: Ic6b4dbfbac0ebedf46df6efe9875cc2e1662d9d2

recipes/wlan/qcacld32-hl_git.bb

@@ -60,6 +60,7 @@ do_compile:prepend() {
 }
 
 do_compile() {
+    variant="${@bb.utils.contains('DEBUG_BUILD','1', "debug", "perf", d)}"
     cd ${KERNEL_PLATFORM_PATH}
     ENABLE_DDK_BUILD=${ENABLE_DDK_BUILD} \
     TARGET_BOARD_PLATFORM=${TARGET_BOARD_PLATFORM} \
@@ -68,6 +69,7 @@ do_compile() {
     ROOTDIR=${WORKDIR}/ \
     MODULE_OUT=${S} \
     OUT_DIR=${KERNEL_OUT_PATH}/ \
+    VARIANT=${variant}_defconfig \
     KERNEL_UAPI_HEADERS_DIR=${STAGING_KERNEL_BUILDDIR} \
     ./build/build_module.sh
 }