src/soc/intel/tigerlake: Add SPI DMI Destination ID

This change adds the SPI-DMI Destination ID for tigerlake
soc. This is needed for enabling support for extended
BIOS region. Also, implements a SOC helper function
soc_get_spi_dmi_destination_id() which returns SPI-DMI
Destination id.

BUG=b:171534504

Signed-off-by: Srinidhi N Kaushik <srinidhi.n.kaushik@intel.com>
Change-Id: I0b6a8af0c1e79fa668ef2f84b93f3bbece59eb6a
Reviewed-on: https://review.coreboot.org/c/coreboot/+/47989
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>

src/soc/intel/tigerlake/include/soc/pcr_ids.h

@@ -31,4 +31,9 @@
 #define PID_ESPI	0xc7
 #define PID_SERIALIO	0xcb
 
+/*
+ * SPI - DMI Destination ID
+ */
+#define SPI_DMI_DESTINATION_ID	0x23a8
+
 #endif

src/soc/intel/tigerlake/spi.c

@@ -7,7 +7,9 @@
  */
 
 #include <intelblocks/spi.h>
+#include <intelblocks/fast_spi.h>
 #include <soc/pci_devs.h>
+#include <soc/pcr_ids.h>
 
 int spi_soc_devfn_to_bus(unsigned int devfn)
 {
@@ -23,3 +25,8 @@ int spi_soc_devfn_to_bus(unsigned int devfn)
 	}
 	return -1;
 }
+
+uint32_t soc_get_spi_dmi_destination_id(void)
+{
+	return SPI_DMI_DESTINATION_ID;
+}