qcacld-3.0: Replace CONFIG_MCL_REGDB with CONFIG_REG_CLIENT

Do not use MCL in the macro. Use feature name to define macro.

This is for CONFIG_MCL_REGDB cleanup.

Change-Id: I12af832d81815277ec6014ff5047bf960f01534a
CRs-Fixed: 2411995
diff --git a/Kbuild b/Kbuild
index 627e42f..56fed65 100644
--- a/Kbuild
+++ b/Kbuild
@@ -1933,7 +1933,7 @@
 cppflags-$(CONFIG_FEATURE_WLAN_EXTSCAN) += -DFEATURE_WLAN_EXTSCAN
 cppflags-$(CONFIG_160MHZ_SUPPORT) += -DCONFIG_160MHZ_SUPPORT
 cppflags-$(CONFIG_MCL) += -DCONFIG_MCL
-cppflags-$(CONFIG_MCL_REGDB) += -DCONFIG_MCL_REGDB
+cppflags-$(CONFIG_REG_CLIENT) += -DCONFIG_REG_CLIENT
 cppflags-$(CONFIG_LEGACY_CHAN_ENUM) += -DCONFIG_LEGACY_CHAN_ENUM
 cppflags-$(CONFIG_WLAN_PMO_ENABLE) += -DWLAN_PMO_ENABLE
 cppflags-$(CONFIG_CONVERGED_P2P_ENABLE) += -DCONVERGED_P2P_ENABLE