platform: msm8953: Change to map lk code and data sections, seperately.

Change to map lk code section and rest all sections seperately, in
different pages. This is required, as lk code section will be
readonly and executable, to avoid possible corruption or modification,
during runtime. data and other sections will be mapped as readable,
writeable and non-executable, to avoid any execution from this section.

Change-Id: If22634ebbeca3f495b02aee97c940b9c03ffa752