qcacmn: Enable notifier chain registration API

The qca wifi driver requires to register
with the Linux notifier chain
for handling panic events.

Enable build for QAL API's
for registration with Linux panic notifier chain

Change-Id: Ibe5376613b66cb90bcb1e84dfeb28365ab19cfb7
CRs-Fixed: 2413782

qdf/Kbuild

@@ -62,6 +62,7 @@ $(HOST_CMN_CONVG_NLINK)/src/wlan_nlink_srv.o \
 $(HOST_QAL_SRC)/linux/src/qal_devcfg.o \
 $(HOST_QAL_SRC)/linux/src/qal_vbus_dev.o \
 $(HOST_QAL_SRC)/linux/src/qal_streamfs.o \
+$(HOST_QAL_SRC)/linux/src/qal_notifier.o \
 #linux/src/qdf_net.o \
 #linux/src/qdf_net_event.o \
 #linux/src/qdf_net_ioctl.o