soc/intel/alderlake: Add missing min sleep state for SMBUS device

Fixes:
Unknown min d_state for PCI: 00:1f.4

Change-Id: I8050c8d574ea5908d5ad3f1e5a034257fabb72c5
Signed-off-by: Brandon Weeks <bweeks@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/86259
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Subrata Banik <subratabanik@google.com>

src/soc/intel/alderlake/acpi.c

@@ -217,6 +217,7 @@ static struct min_sleep_state min_pci_sleep_states[] = {
 	{ PCH_DEVFN_ESPI,	ACPI_DEVICE_SLEEP_D0 },
 	{ PCH_DEVFN_PMC,	ACPI_DEVICE_SLEEP_D0 },
 	{ PCH_DEVFN_HDA,	ACPI_DEVICE_SLEEP_D0 },
+	{ PCH_DEVFN_SMBUS,	ACPI_DEVICE_SLEEP_D0 },
 	{ PCH_DEVFN_SPI,	ACPI_DEVICE_SLEEP_D3 },
 	{ PCH_DEVFN_GBE,	ACPI_DEVICE_SLEEP_D3 },
 };