soc/amd/phoenix: Update XHCI events

Set up SoC-specific XHCI defines and enable SOC_AMD_COMMON_BLOCK_XHCI
to allow for XHCI events to be logged.

BUG=b:277273428
TEST=builds

Change-Id: I3ca4f84fb0f1fef8441ab6ef7b6f6348c52b2922
Signed-off-by: Jon Murphy <jpmurphy@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/74280
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/soc/amd/phoenix/Kconfig b/src/soc/amd/phoenix/Kconfig
index 5d3adec..64617f9 100644
--- a/src/soc/amd/phoenix/Kconfig
+++ b/src/soc/amd/phoenix/Kconfig
@@ -74,6 +74,7 @@
 	select SOC_AMD_COMMON_BLOCK_TSC
 	select SOC_AMD_COMMON_BLOCK_UART
 	select SOC_AMD_COMMON_BLOCK_UCODE
+	select SOC_AMD_COMMON_BLOCK_XHCI
 	select SOC_AMD_COMMON_FSP_CCX_CPPC_HOB		# TODO: Check if this is still correct
 	select SOC_AMD_COMMON_FSP_DMI_TABLES		# TODO: Check if this is still correct
 	select SOC_AMD_COMMON_FSP_PCI			# TODO: Check if this is still correct