soc/amd/picasso: Enable VBNV_BACKUP_TO_FLASH for psp_verstage

Enable the Kconfig flag VBOOT_VBNV_CMOS_BACKUP_TO_FLASH for psp_verstage
to save the vbnv data to the SPI rom.

BUG=b:161366241
TEST=Boot Morphius, Read rom from SPI and extract the RW_NVRAM region.
See that it's getting updated.

Signed-off-by: Martin Roth <martinroth@chromium.org>
Change-Id: I0d4b92fa321a8409468b8d8fc40be0d4b57b664b
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43487
Reviewed-by: Raul Rangel <rrangel@chromium.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/soc/amd/picasso/Kconfig b/src/soc/amd/picasso/Kconfig
index aaabf43..526900a 100644
--- a/src/soc/amd/picasso/Kconfig
+++ b/src/soc/amd/picasso/Kconfig
@@ -497,7 +497,7 @@
 
 config VBOOT
 	select VBOOT_VBNV_CMOS
-	select VBOOT_VBNV_CMOS_BACKUP_TO_FLASH if ! VBOOT_STARTS_BEFORE_BOOTBLOCK
+	select VBOOT_VBNV_CMOS_BACKUP_TO_FLASH
 
 config VBOOT_STARTS_BEFORE_BOOTBLOCK
 	def_bool n