Samuel Holland

fix(build): discard sections also with SEPARATE_NOBITS_REGION

fix(build): disable default PIE when linking

refactor(plat/allwinner): clean up platform definitions

refactor(plat/allwinner): do not map BL32 DRAM at EL3

refactor(plat/allwinner): map SRAM as device memory by default

refactor(plat/allwinner): rename static mmap region constant

feat(bl_common): import BL_NOBITS_{BASE,END} when defined

allwinner: Allow conditional compilation of SCPI and native PSCI ops