Change in coreboot[master]: arch/x86: Add a common romstage entry

[Arthur Heymans (Code Review)]

Attention is currently required from: Jason Glenesk, Raul Rangel, Furquan Shaikh, Marshall Dawson, Angel Pons, Fred Reitberger, Patrick Rudolph, Felix Held.
Arthur Heymans has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/55067 )

Change subject: arch/x86: Add a common romstage entry
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Patch Set 7:

(3 comments)

File src/arch/x86/romstage.c:

https://review.coreboot.org/c/coreboot/+/55067/comment/6ba17d01_1907e636 
PS5, Line 8: /* Provide an entry point for verstage when it's a separate stage. */
> verstage?

Done

File src/soc/amd/cezanne/romstage.c:

https://review.coreboot.org/c/coreboot/+/55067/comment/ab33138f_ebe3a7da 
PS5, Line 4: #include <acpi/acpi.h>
           : #include <amdblocks/acpimmio.h>
           : #include <amdblocks/memmap.h>
           : #include <amdblocks/pmlib.h>
           : #include <arch/cpu.h>
           : #include <console/console.h>
           : #include <fsp/api.h>
           : #include <program_loading.h>
           : #include <timestamp.h>
> Looks like these includes are sorted alphabetically. […]

Done

https://review.coreboot.org/c/coreboot/+/55067/comment/b3e9b833_ce3c8bec 
PS5, Line 16: 	timestamp_add_now(TS_START_ROMSTAGE);
> This needs to be removed

Done