Adding support for TL-WA750RE

I have this little gadget. I've build gluon for this target and it seems that everything works well. Using this thing in the Stuttgart community (currently testing gluon).

targets/ar71xx-generic/profiles.mk

@@ -56,6 +56,10 @@ $(eval $(call GluonModel,TLWDR4300,tl-wdr3500-v1-squashfs,tp-link-tl-wdr3500-v1)
 $(eval $(call GluonModel,TLWDR4300,tl-wdr3600-v1-squashfs,tp-link-tl-wdr3600-v1))
 $(eval $(call GluonModel,TLWDR4300,tl-wdr4300-v1-squashfs,tp-link-tl-wdr4300-v1))
 
+# TL-WA750RE v1
+$(eval $(call GluonProfile,TLWA750))
+$(eval $(call GluonModel,TLWA750,tl-wa750re-v1-squashfs,tp-link-tl-wa750re-v1))
+
 # TL-WA901N/ND v2
 $(eval $(call GluonProfile,TLWA901))
 $(eval $(call GluonModel,TLWA901,tl-wa901nd-v2-squashfs,tp-link-tl-wa901n-nd-v2))