soc/amd: Move update_microcode.c to common/block/cpu

We also want to support uCode loading on cezanne.

Signed-off-by: Raul E Rangel <rrangel@chromium.org>
Change-Id: I6f10564c93ce72aea7ff52a8565d65d8b56452f3
Reviewed-on: https://review.coreboot.org/c/coreboot/+/50615
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>

src/soc/amd/picasso/Makefile.inc

@@ -48,7 +48,6 @@ ramstage-y += uart.c
 ramstage-y += finalize.c
 ramstage-y += soc_util.c
 ramstage-y += fsp_params.c
-ramstage-y += update_microcode.c
 ramstage-y += graphics.c
 ramstage-y += pcie_gpp.c
 ramstage-y += xhci.c