acpi: Remove acpi_ from filenames

This change drops acpi_ prefix from filenames under src/acpi/.

BUG=b:155428745

Change-Id: Iadda2b848701367e51f4f74706154f7e36a87df6
Signed-off-by: Furquan Shaikh <furquan@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/40941
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: HAOUAS Elyes <ehaouas@noos.fr>

src/acpi/Makefile.inc

@@ -4,12 +4,11 @@
 ifeq ($(CONFIG_HAVE_ACPI_TABLES),y)
 
 ramstage-y += acpi.c
-ramstage-y += acpi_device.c
-ramstage-y += acpi_pld.c
 ramstage-y += acpigen.c
 ramstage-y += acpigen_dsm.c
 ramstage-y += acpigen_ps2_keybd.c
-
+ramstage-y += device.c
+ramstage-y += pld.c
 ramstage-y += sata.c
 
 ifneq ($(wildcard src/mainboard/$(MAINBOARDDIR)/acpi_tables.c),)