soc/amd/cezanne,picasso: rename fsp_params.c to fsp_s_params.c

This file populates the UPD-S data structure that gets passed to the
FSP-S, so add that s part to make it a bit clearer which FSP parameters
it'll set up. This is also a preparation to add a fsp_m_params.c file in
the following patches.

Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: I53786df0909055e66eac675b5580909b7960944f
Reviewed-on: https://review.coreboot.org/c/coreboot/+/51833
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Raul Rangel <rrangel@chromium.org>

src/soc/amd/cezanne/Makefile.inc

@@ -33,7 +33,7 @@ ramstage-y	+= chip.c
 ramstage-y	+= cpu.c
 ramstage-y	+= data_fabric.c
 ramstage-y	+= fch.c
-ramstage-y	+= fsp_params.c
+ramstage-y	+= fsp_s_params.c
 ramstage-y	+= gpio.c
 ramstage-y	+= pcie_gpp.c
 ramstage-y	+= reset.c

src/soc/amd/picasso/Makefile.inc

@@ -45,7 +45,7 @@ ramstage-y += acp.c
 ramstage-y += sata.c
 ramstage-y += uart.c
 ramstage-y += soc_util.c
-ramstage-y += fsp_params.c
+ramstage-y += fsp_s_params.c
 ramstage-y += graphics.c
 ramstage-y += pcie_gpp.c
 ramstage-y += xhci.c