soc/amd/common/acp: Move Audio Co-processor driver to common

Audio Co-processor driver is similar for both Picasso and Cezanne SoCs.
Hence move it to the common location.

BUG=None.
TEST=Builds Dalboz, Trembyle, Vilboz, Mandolin and Bilby mainboards.

Change-Id: I91470ff68d1c183df9a2927d71b03371b535186a
Signed-off-by: Karthikeyan Ramasubramanian <kramasub@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/52643
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Raul Rangel <rrangel@chromium.org>

src/soc/amd/picasso/Makefile.inc

@@ -43,7 +43,6 @@ ramstage-$(CONFIG_HAVE_ACPI_TABLES) += agesa_acpi.c
 ramstage-y += gpio.c
 ramstage-y += fch.c
 ramstage-y += reset.c
-ramstage-y += acp.c
 ramstage-y += sata.c
 ramstage-y += uart.c
 ramstage-y += soc_util.c