[L] Change in coreboot[master]: profiler: Add basic profiler with cbmem support

[Jakub Czapiga (Code Review)]

Attention is currently required from: Tarun Tuli, Martin L Roth, Tim Wawrzynczak, Reka Norman.

Hello build bot (Jenkins), Tarun Tuli, Martin L Roth, Reka Norman,

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/coreboot/+/65606

to look at the new patch set (#10).

Change subject: profiler: Add basic profiler with cbmem support
......................................................................

profiler: Add basic profiler with cbmem support

How to generate flamegraph:
1. Build and run coreboot with CONFIG_PROFILER
2. `cbmem -p > profiler.dump`
3. `util/profiler_tools/profiler_addr2line.py -e ramstage.debug \
    -o collapsed.txt profiler.dump`
    4. `flamegraph.pl collapsed.txt > graph.svg`

Overhead is about 8-15% depending on platform.

Signed-off-by: Jakub Czapiga 
Change-Id: I5665922b1109ee9305274294c93de577f1bf9ae2
---
M Makefile.inc
M src/Kconfig
M src/arch/arm64/arch_timer.c
M src/arch/arm64/armv8/exception.c
M src/arch/arm64/transition.c
M src/arch/x86/c_start.S
M src/arch/x86/cpu.c
M src/commonlib/bsd/include/commonlib/bsd/cbmem_id.h
M src/commonlib/bsd/include/commonlib/bsd/compiler.h
A src/commonlib/bsd/include/commonlib/bsd/profiler.h
M src/lib/Makefile.inc
A src/lib/profiler.c
M util/cbmem/cbmem.c
A util/profiler_tools/profiler_addr2line.py
14 files changed, 551 insertions(+), 3 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/06/65606/10