soc/amd/common/fsp: Fix dimm_num assignment

The dimm_num shall be dimm, not channel.

BUG=b:288520486
TEST=In kernel, see output from `dmidecode -t 17`.
Observe that Locator reflects proper location of the module.

Change-Id: Id876a5c245ed1a145c930b3456830d7b42780b74
Signed-off-by: Konrad Adamczyk <konrada@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/76108
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Matt DeVillier <matt.devillier@amd.corp-partner.google.com>
diff --git a/src/soc/amd/common/fsp/dmi.c b/src/soc/amd/common/fsp/dmi.c
index a671476..408c0e4 100644
--- a/src/soc/amd/common/fsp/dmi.c
+++ b/src/soc/amd/common/fsp/dmi.c
@@ -226,7 +226,7 @@
 			print_dmi_info(type17_dmi_info);
 			dimm_info = &mem_info->dimm[dimm_cnt];
 			dimm_info->channel_num = channel;
-			dimm_info->dimm_num = channel;
+			dimm_info->dimm_num = dimm;
 			transfer_memory_info(type17_dmi_info, dimm_info);
 			if (use_cbi_part_number) {
 				/* mem_info is memset to 0 above, so it's