qcacld-3.0: Enable GreenAp feature in Kbuild

GreenAp is not enabled in Kbuild.

Enable GreenAp feature in Kbuild.

Change-Id: Ia3ea7055de12361d37c6a0de1fca3db7087d3489
CRs-Fixed: 2019921

Kbuild

@@ -121,6 +121,7 @@ ifeq ($(KERNEL_BUILD), 0)
 	endif
 
 	ifeq ($(CONFIG_ARCH_SDM660), y)
+	CONFIG_QCACLD_FEATURE_GREEN_AP := y
 	CONFIG_QCACLD_FEATURE_METERING := y
 	endif