ipq40xx: fix boards being shown twice
Since generic images have been split to their own
Makefile boards are showing up twice in menuconfig
as $(eval $(call BuildImage)) was not dropped from
the new generic.mk.
Hence $(eval $(call BuildImage)) was being called
twice.
So, lets simply drop it from generic.mk.
Fixes: 378c7ff28210 ("ipq40xx: split generic images into own file")
Signed-off-by: Robert Marko <[email protected]>
Robert Marko