qcacld-3.0: Add sysfs interface for retrieving version information

User-space needs sysfs interface for retrieving version
information for both firmware and driver. Add this new
sysfs interface.

Change-Id: I666aff1868f4d1d954773fae1ae85c1ebd0fdc87
CRs-Fixed: 2153885
diff --git a/Kbuild b/Kbuild
index 7937f99..1fd12bf 100644
--- a/Kbuild
+++ b/Kbuild
@@ -440,6 +440,7 @@
 		$(HDD_SRC_DIR)/wlan_hdd_request_manager.o \
 		$(HDD_SRC_DIR)/wlan_hdd_scan.o \
 		$(HDD_SRC_DIR)/wlan_hdd_softap_tx_rx.o \
+		$(HDD_SRC_DIR)/wlan_hdd_sysfs.o \
 		$(HDD_SRC_DIR)/wlan_hdd_tx_rx.o \
 		$(HDD_SRC_DIR)/wlan_hdd_trace.o \
 		$(HDD_SRC_DIR)/wlan_hdd_wext.o \