coreboot

While building from master (testing CB:85609), I've noticed CBMEM complaining about stack corruption.
Older build made a ~month ago did not experience the same issue. Maybe caused by Xeon-SP refactoring?

`[INFO ] CBFS: Found 'fallback/romstage' @0x21d40 size 0x11c28 in mcache @0xfef8c28c
[DEBUG] BS: bootblock times (exec / console): total (unknown) / 465 ms

[NOTE ] coreboot-24.08-922-gf9b4c5a996dc-dirty Mon Dec 16 23:28:48 UTC 2024 x86_32 romstage starting (log level: 8)...
[ERROR] Stack corruption detected at eip: 0xffc74870
[DEBUG] pm1_sts: 0000 pm1_en: 0000 pm1_cnt: 00001c00
[DEBUG] gpe0_sts[0]: 00000000 gpe0_en[0]: 00000000
[DEBUG] gpe0_sts[1]: 00000000 gpe0_en[1]: 00000000
[DEBUG] gpe0_sts[2]: 00000000 gpe0_en[2]: 00000000
[DEBUG] gpe0_sts[3]: 00000000 gpe0_en[3]: 00000000
[DEBUG] TCO_STS: 0000 0000
[DEBUG] GEN_PMCON: d8a01a78 00002200
[DEBUG] GBLRST_CAUSE: 00000002 00000000
[DEBUG] HPR_CAUSE0: 00000002
[DEBUG] prev_sleep_state 0 (S0)
[INFO ] OC Watchdog: disabling watchdog timer
[DEBUG] Abort disabling TXT, as CPU is not TXT capable.
[SPEW ] CBFS DEBUG: _cbfs_alloc(name='fspm.bin', alloc=0x00000000(0xfef87e98), force_ro=false, type=-1)
[DEBUG] FMAP: area COREBOOT found @ c50200 (3866112 bytes)
[INFO ] Fixed Decode Window: SPI flash base=0x600000, Host base=0xff600000, Size=0xa00000
[INFO ] CBFS: Found 'fspm.bin' @0x58dc0 size 0xc0000 in mcache @0xfef8c414
[DEBUG] FMAP: area RW_MRC_CACHE found @ c00000 (65536 bytes)
[SPEW ] MRC cache found, size 63176 bytes
[SPEW ] bootmode is set to: 2 (boot assuming no config change)`