arch:arm: msm: removed not needed device trees

In order to expand the boot.img and recovery.img
memory removed not needed DTBs from the Makefile.

Original commit id: 39091c5c
CR fixed: 906361

Change-Id: I3a188ac3e4d61a640296d86244b881a0165b04bd
Signed-off-by: Bharat Pawar <bpawar@codeaurora.org>