qcacld-3.0: Enable mtrace logging

Enable the mtrace logging by adding CONFIG_ENABLE_MTRACE
flag in Kbuild and defconfig file.

Change-Id: I832ab008dc4b7eb7e3124382ebe395cb01464a20
CRs-Fixed: 2311833
diff --git a/Kbuild b/Kbuild
index 0d67578..085db37 100755
--- a/Kbuild
+++ b/Kbuild
@@ -2266,6 +2266,9 @@
 
 cppflags-$(CONFIG_ENABLE_SMMU_S1_TRANSLATION) += -DENABLE_SMMU_S1_TRANSLATION
 
+#Flag to enable/disable MTRACE feature
+cppflags-$(CONFIG_ENABLE_MTRACE_LOG) += -DENABLE_MTRACE_LOG
+
 #Flag to enable NUD tracking
 cppflags-$(CONFIG_WLAN_NUD_TRACKING) += -DWLAN_NUD_TRACKING