pandaboard:device.mk: paramterize building with software GL

Change-Id: Ifc0dd8301953c0bccb7becdf8edc35f56e6027d8
Signed-off-by: Vishal Bhoj <vishal.bhoj@linaro.org>
diff --git a/device.mk b/device.mk
index 584a8ed..8a6d5a6 100644
--- a/device.mk
+++ b/device.mk
@@ -39,6 +39,10 @@
 
 $(call inherit-product, frameworks/base/build/tablet-dalvik-heap.mk)
 
+ifeq ($(TARGET_NO_HARDWAREGFX),1)
 PRODUCT_PROPERTY_OVERRIDES += \
         ro.nohardwaregfx=true
-
+else
+PRODUCT_PACKAGES := \
+        hwcomposer.omap4
+endif