mb/msi/ms7d25/vboot-rwab.fmd: Add 32KiB HSPHY cache region

Add the HSPHY region required by INCLUDE_HSPHY_IN_FMAP option. It is
needed in case CSME/HECI is disabled or not visible to keep the
PCIe 5.0 root ports functional.

Signed-off-by: Michał Żygowski <michal.zygowski@3mdeb.com>
Change-Id: Ic4793fc9457f58e914ef3e18cce1294f230462bd
Reviewed-on: https://review.coreboot.org/c/coreboot/+/68988
Reviewed-by: Krystian Hebel <krystian.hebel@3mdeb.com>
Reviewed-by: Paul Menzel <paulepanter@mailbox.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/mainboard/msi/ms7d25/vboot-rwab.fmd b/src/mainboard/msi/ms7d25/vboot-rwab.fmd
index b4dc044..665c894 100644
--- a/src/mainboard/msi/ms7d25/vboot-rwab.fmd
+++ b/src/mainboard/msi/ms7d25/vboot-rwab.fmd
@@ -22,14 +22,15 @@
 
 	CONSOLE 128K
 	SMMSTORE(PRESERVE) 256K
+	HSPHY_FW(PRESERVE) 32K
 
-	RW_SECTION_A 5280K {
+	RW_SECTION_A 5264K {
 		VBLOCK_A 64K
 		FW_MAIN_A(CBFS)
 		RW_FWID_A 0x100
 	}
 
-	RW_SECTION_B 5280K {
+	RW_SECTION_B 5264K {
 		VBLOCK_B 64K
 		FW_MAIN_B(CBFS)
 		RW_FWID_B 0x100