wifi_hal: add slsi wifi hal support

Change-Id: Ie5f04510252cbd5411f9e3d7c25c361361b7b195
diff --git a/libwifi_hal/Android.mk b/libwifi_hal/Android.mk
index b5e6155..1feb5ad 100644
--- a/libwifi_hal/Android.mk
+++ b/libwifi_hal/Android.mk
@@ -112,6 +112,8 @@
     LIB_WIFI_HAL := libwifi-hal-rtk
   else ifeq ($(BOARD_WLAN_DEVICE), emulator)
     LIB_WIFI_HAL := libwifi-hal-emu
+  else ifeq ($(BOARD_WLAN_DEVICE), slsi)
+    LIB_WIFI_HAL := libwifi-hal-slsi
   endif
 endif