drivers/intel/fsp2_0/hand_off_block: use cb_err in fsp_find_range_hob

Use enum cb_err as return value of fsp_find_range_hob instead of using
the raw -1 and 0 values. Also update the call sites accordingly.

Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: Id6c9f69a886f53868f1ef543c8fa04be95381f53
Reviewed-on: https://review.coreboot.org/c/coreboot/+/74082
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martin.roth@amd.corp-partner.google.com>
Reviewed-by: Felix Singer <felixsinger@posteo.net>
Reviewed-by: Matt DeVillier <matt.devillier@amd.corp-partner.google.com>
Reviewed-by: Pratikkumar V Prajapati <pratikkumar.v.prajapati@intel.com>
Reviewed-by: Fred Reitberger <reitbergerfred@gmail.com>

src/soc/amd/common/block/cpu/noncar/memmap.c

@@ -46,7 +46,7 @@ void smm_region(uintptr_t *start, size_t *size)
 
 	struct range_entry tseg;
 
-	if (fsp_find_range_hob(&tseg, AMD_FSP_TSEG_HOB_GUID.b) < 0) {
+	if (fsp_find_range_hob(&tseg, AMD_FSP_TSEG_HOB_GUID.b) != CB_SUCCESS) {
 		printk(BIOS_ERR, "unable to find TSEG HOB\n");
 		return;
 	}