arm: cortex-m: clean up some more hard-coded constants in swap_helper

Clean up a few more hard-coded constants
in swap_helper.S and replace them with
CMSIS-like defines in cpu.h. No behavioral
changes in this commit.

Signed-off-by: Ioannis Glaropoulos <Ioannis.Glaropoulos@nordicsemi.no>
2 files changed