cbfstool/default-x86.fmd: Rename BIOS -> SI_BIOS

Currently ifdtool --validate will not correctly validate the FMAP
against the IFD regions, since it will compare the IFD bios region with
an FMAP region called SI_BIOS.

It's probably a good idea to define default name for the BIOS FMAP
region like we have for 'COREBOOT' or 'FMAP' FMAP region.

Signed-off-by: Maximilian Brune <maximilian.brune@9elements.com>
Change-Id: I55eddfb5641b3011d4525893604ccf87fa05a1e2
Reviewed-on: https://review.coreboot.org/c/coreboot/+/73449
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Lean Sheng Tan <sheng.tan@9elements.com>
diff --git a/util/cbfstool/default-x86.fmd b/util/cbfstool/default-x86.fmd
index 41be782..8991a81 100644
--- a/util/cbfstool/default-x86.fmd
+++ b/util/cbfstool/default-x86.fmd
@@ -8,7 +8,7 @@
 # +-------------+ <-- 4GB / end of flash
 
 FLASH@##ROM_BASE## ##ROM_SIZE## {
-	BIOS@##BIOS_BASE## ##BIOS_SIZE## {
+	SI_BIOS@##BIOS_BASE## ##BIOS_SIZE## {
 		##CONSOLE_ENTRY##
 		##MRC_CACHE_ENTRY##
 		##SMMSTORE_ENTRY##