soc/amd: unify SMBus support

The SMBus support is identical between stoneyridge and picasso.
Unify on common support code.

Change-Id: Ic3412c5ee67977a45c50b68f36acc45c3d560db5
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/38616
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>
diff --git a/src/soc/amd/picasso/Kconfig b/src/soc/amd/picasso/Kconfig
index 7561414..acceb00 100644
--- a/src/soc/amd/picasso/Kconfig
+++ b/src/soc/amd/picasso/Kconfig
@@ -47,6 +47,7 @@
 	select SOC_AMD_COMMON_BLOCK_PCI
 	select SOC_AMD_COMMON_BLOCK_HDA
 	select SOC_AMD_COMMON_BLOCK_SATA
+	select SOC_AMD_COMMON_BLOCK_SMBUS
 	select BOOT_DEVICE_SUPPORTS_WRITES if BOOT_DEVICE_SPI_FLASH
 	select BOOT_DEVICE_SPI_FLASH_RW_NOMMAP_EARLY if BOOT_DEVICE_SPI_FLASH
 	select PARALLEL_MP