soc/intel/common/block/lpc: Move southbridge_write_acpi_tables declaration

Move the southbridge_write_acpi_tables declaration from acpi.h to common
lpc_lib.h, as common LPC is always the caller. This removes a duplicate
declaration since all soc/intel devices use common LPC, but not all use
common ACPI. The southbridge_write_acpi_tables function is defined in acpi.c
with the other acpi functions.

Note that this would have the reverse problem if there is ever a non-common
LPC device.

Change-Id: I0590a028b11f34e423d8f0007e0653037b0849a0
Signed-off-by: Marc Jones <marcjones@sysproconsulting.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/48251
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Jay Talbott <JayTalbott@sysproconsulting.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/soc/intel/common/block/acpi/acpi.c b/src/soc/intel/common/block/acpi/acpi.c
index 4efeb88..2948faf 100644
--- a/src/soc/intel/common/block/acpi/acpi.c
+++ b/src/soc/intel/common/block/acpi/acpi.c
@@ -13,6 +13,7 @@
 #include <cpu/intel/common/common.h>
 #include <cpu/x86/smm.h>
 #include <intelblocks/acpi.h>
+#include <intelblocks/lpc_lib.h>
 #include <intelblocks/msr.h>
 #include <intelblocks/pmclib.h>
 #include <intelblocks/uart.h>