task: ELF loader update

This patch updates the task elf loader so that it expects separate text and data
segments and the -N linker option is no longer required when compiling the task
elf. This change is to allow for optimizations when loading task elfs into MPU
storage.

Signed-off-by: Yuji Mano <yuji.mano@am.sony.com>
Acked-by: Kazunori Asayama <asayama@sm.sony.co.jp>
3 files changed