support CONFIG_DRIVER_NL80211_SYNA for syna wifi

Bug: 226553677
Test: 1. build pass
      2. Manual - wifi can enable/scan/connect

Change-Id: I38e9dc9c37036283bdc35dfa18d2af25b029a451
diff --git a/src/drivers/drivers.mak b/src/drivers/drivers.mak
index a03d4a0..0186099 100644
--- a/src/drivers/drivers.mak
+++ b/src/drivers/drivers.mak
@@ -30,6 +30,10 @@
 DRV_CFLAGS += -DCONFIG_DRIVER_NL80211_BRCM
 endif
 
+ifdef CONFIG_DRIVER_NL80211_SYNA
+DRV_CFLAGS += -DCONFIG_DRIVER_NL80211_SYNA
+endif
+
 ifdef CONFIG_DRIVER_MACSEC_QCA
 DRV_CFLAGS += -DCONFIG_DRIVER_MACSEC_QCA
 DRV_OBJS += ../src/drivers/driver_macsec_qca.o