soc/amd/picasso/cpu: move get_cpu_count to common code

Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: I0690787f492d764a20a4219822eb10fb5cd86de0
Reviewed-on: https://review.coreboot.org/c/coreboot/+/50406
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>

src/soc/amd/picasso/acpi.c

@@ -19,9 +19,9 @@
 #include <device/pci.h>
 #include <amdblocks/acpimmio.h>
 #include <amdblocks/acpi.h>
+#include <amdblocks/cpu.h>
 #include <soc/acpi.h>
 #include <soc/pci_devs.h>
-#include <soc/cpu.h>
 #include <soc/msr.h>
 #include <soc/southbridge.h>
 #include <soc/nvs.h>