Change in coreboot[master]: psp_verstage: move platform-specific code to chipset.c

[Kangheui Won (Code Review)]

Attention is currently required from: Jason Glenesk, Marshall Dawson, Felix Held.
Hello build bot (Jenkins), Jason Glenesk, Raul Rangel, Marshall Dawson, Felix Held,

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

https://review.coreboot.org/c/coreboot/+/52963

to look at the new patch set (#3).

Change subject: psp_verstage: move platform-specific code to chipset.c
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psp_verstage: move platform-specific code to chipset.c

Move all platform-specific code except direct svc calls to chipset.c.
There will be differences between each platforms and we can't put
everything into svc.c.

TEST=build firmware for zork

Signed-off-by: Kangheui Won 
Change-Id: Ie7a71d1632800072a17c26591e13e09e0269cf75
---
M src/soc/amd/cezanne/psp_verstage/Makefile.inc
R src/soc/amd/cezanne/psp_verstage/chipset.c
M src/soc/amd/cezanne/psp_verstage/svc.c
M src/soc/amd/picasso/psp_verstage/Makefile.inc
A src/soc/amd/picasso/psp_verstage/chipset.c
M src/soc/amd/picasso/psp_verstage/svc.c
6 files changed, 37 insertions(+), 27 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/63/52963/3