mb/google/brya/var/omnigul: Correct mux_conn for USB C1

Modify USB C1 mux_conn to 1. It should match ec settings.

BUG=b:272394875, b:272667290
BRANCH=firmware-brya-14505.B
TEST=Plug USB-C hub in USB C1 and could recognize USB drive and hdmi.

Change-Id: I61b77405d1790b044174cef954e5bf910141f424
Signed-off-by: Dtrain Hsu <dtrain_hsu@compal.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/73679
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>
Reviewed-by: Derek Huang <derekhuang@google.com>
Reviewed-by: Ian Feng <ian_feng@compal.corp-partner.google.com>
Reviewed-by: Frank Wu <frank_wu@compal.corp-partner.google.com>
Reviewed-by: Subrata Banik <subratabanik@google.com>
diff --git a/src/mainboard/google/brya/variants/omnigul/overridetree.cb b/src/mainboard/google/brya/variants/omnigul/overridetree.cb
index fbaef32..00e4eec 100644
--- a/src/mainboard/google/brya/variants/omnigul/overridetree.cb
+++ b/src/mainboard/google/brya/variants/omnigul/overridetree.cb
@@ -193,7 +193,7 @@
 		device ref pch_espi on
 			chip ec/google/chromeec
 				use conn0 as mux_conn[0]
-				use conn1 as mux_conn[2]
+				use conn1 as mux_conn[1]
 				device pnp 0c09.0 on end
 			end
 		end