mb/starlabs/starbook/{tgl,adl}: Set DmiMaxLinkSpeed to 4

Set DmiMaxLinkSpeed to 4 in FSP to ensure that FSP always supports
PCIe Gen 4 drives.

Signed-off-by: Sean Rhodes <sean@starlabs.systems>
Change-Id: I0e31919122dacfbdc2486fa8216a28b479f3bd00
Reviewed-on: https://review.coreboot.org/c/coreboot/+/72012
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

src/mainboard/starlabs/starbook/variants/adl/romstage.c

@@ -33,4 +33,6 @@ void mainboard_memory_init_params(FSPM_UPD *mupd)
 	/* Enable/Disable Wireless (RP05) based on CMOS settings */
 	if (get_uint_option("wireless", 1) == 0)
 		mupd->FspmConfig.PcieRpEnableMask &= ~(1 << 4);
+
+	mupd->FspmConfig.DmiMaxLinkSpeed = 4;
 };

src/mainboard/starlabs/starbook/variants/tgl/romstage.c

@@ -37,4 +37,5 @@ void mainboard_memory_init_params(FSPM_UPD *mupd)
 		mupd->FspmConfig.TcssDma0En = 0;
 		mupd->FspmConfig.TcssItbtPcie0En = 0;
 	}
+	mupd->FspmConfig.DmiMaxLinkSpeed = 4;
 };