qcacld-3.0: Correct common project header files path

Under new kernel tree structure, the kernel can be either directly
under build_root/kernel or in a subdirectory within it. The WLAN
module has a hard coded assumption for the header files path of
newly added common project. Hence add the change to correct it based
on KERNEL_TO_BUILD_ROOT_OFFSET.

Change-Id: Ibe3a61a62cd2b2cea65c5a14f2bf70b998787f54
CRs-fixed: 992940

Android.mk

@@ -42,9 +42,8 @@ endif # platform-sdk-version
 ###########################################################
 # This is set once per LOCAL_PATH, not per (kernel) module
 KBUILD_OPTIONS := WLAN_ROOT=$(KERNEL_TO_BUILD_ROOT_OFFSET)$(WLAN_BLD_DIR)/qcacld-3.0
-KBUILD_OPTIONS += WLAN_COMMON_ROOT=../../../opensource/wlan/qca-wifi-host-cmn
-KBUILD_OPTIONS += WLAN_COMMON_INC=../vendor/qcom/opensource/wlan/qca-wifi-host-cmn
-
+KBUILD_OPTIONS += WLAN_COMMON_ROOT=../qca-wifi-host-cmn
+KBUILD_OPTIONS += WLAN_COMMON_INC=$(KERNEL_TO_BUILD_ROOT_OFFSET)$(WLAN_BLD_DIR)/qca-wifi-host-cmn
 
 # We are actually building wlan.ko here, as per the
 # requirement we are specifying <chipset>_wlan.ko as LOCAL_MODULE.