qcacld-3.0: Define CONFIG_MCL_REGDB in Kbuild

Currently, CONFIG_MCL_REGDB does not define for MCL,
then the driver uses the g_all_countries[] which is
for WIN.

Change-Id: If1b5873b65005381eabca95f530504d599a38e3b
CRs-Fixed: 2210854
diff --git a/Kbuild b/Kbuild
index 7dbf613..9222885 100644
--- a/Kbuild
+++ b/Kbuild
@@ -1873,6 +1873,7 @@
 		-DWLAN_FEATURE_MBSSID \
 		-DCONFIG_160MHZ_SUPPORT \
 		-DCONFIG_MCL \
+		-DCONFIG_MCL_REGDB \
 		-DCONFIG_LEGACY_CHAN_ENUM \
 		-DNAPIER_SCAN \
 		-DWLAN_PMO_ENABLE \