wlan: Install stipped-off version of prima driver.

Changes in the prima Makefile for LE to install
stipped-off wlan driver version.

Change-Id: I3441bc8c7c1393b9b14b5554c41d9be200d4f08b
CRs-Fixed: 703808
diff --git a/Makefile b/Makefile
index a5f840a..d5c94f0 100644
--- a/Makefile
+++ b/Makefile
@@ -7,6 +7,9 @@
 	$(MAKE) -C $(KERNEL_SOURCE) $(KBUILD_OPTIONS) $(EXTRA_CFLAGS) ARCH=$(ARCH) \
 		SUBDIRS=$(CURDIR) CC=${CC} modules
 
+modules_install:
+	$(MAKE) INSTALL_MOD_STRIP=1 -C $(KERNEL_SRC) M=$(shell pwd) modules_install
+
 clean::
 	rm -f *.o *.ko *.mod.c *.mod.o *~ .*.cmd Module.symvers
 	rm -rf .tmp_versions