soc/intel/common/tcss: Check conn device enabled in tcss_get_port_info

BUG=b:226848617
TEST=With the following change, the nereid C1 PMC mux conn is disabled
based on fw_config, allowing HDMI to work.

Signed-off-by: Reka Norman <rekanorman@google.com>
Change-Id: I487f3ca4be4ead0c5dfb46e9eb19de5ae9b9bda9
Reviewed-on: https://review.coreboot.org/c/coreboot/+/63237
Reviewed-by: Kangheui Won <khwon@chromium.org>
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/soc/intel/common/block/tcss/tcss.c b/src/soc/intel/common/block/tcss/tcss.c
index 2531ac3..e0ca90d 100644
--- a/src/soc/intel/common/block/tcss/tcss.c
+++ b/src/soc/intel/common/block/tcss/tcss.c
@@ -394,7 +394,7 @@
 								ARRAY_SIZE(conn_path));
 		unsigned int usb2_port, usb3_port;
 
-		if (!conn)
+		if (!is_dev_enabled(conn))
 			continue;
 
 		if (CONFIG(DRIVERS_INTEL_PMC) &&