Remove extra symbol in Makefile

While trying out different unroll values, noted that
make failed due to this extra symbol.

kernel/Makefile.L3

@@ -2351,7 +2351,7 @@ $(SGEMMITCOPYOBJ_P) : $(KERNELDIR)/$(SGEMMITCOPY)
 
 endif
 
-$(D<GEMMONCOPYOBJ_P) : $(KERNELDIR)/$(DGEMMONCOPY)
+$(DGEMMONCOPYOBJ_P) : $(KERNELDIR)/$(DGEMMONCOPY)
 	$(CC) $(PFLAGS) -c -DDOUBLE -UCOMPLEX $< -o $@
 
 $(DGEMMOTCOPYOBJ_P) : $(KERNELDIR)/$(DGEMMOTCOPY)