qcacld-3.0: Enable FISA feature for QCA6750 in Kbuild

Enable FISA feature in the host driver for QCA6750.

Change-Id: I1f025cf1336db81a327524e932adaa5401183613
CRs-Fixed: 2717541

configs/default_defconfig

@@ -1089,6 +1089,7 @@ endif
 ifeq ($(CONFIG_CNSS_QCA6750), y)
 #Enable 6 GHz Band
 CONFIG_BAND_6GHZ := y
+CONFIG_RX_FISA := y
 endif
 
 ifeq ($(CONFIG_CNSS_QCA6490), y)