mb/google/nissa/var/nivviks: Add TcssAuxori for nivviks

Enable SBU orientation handling by SoC for both USBC port0 and USBC
port1. Nivviks USBC port0 do not have retimer, USBC port1 has redriver,
but that do not flip the data lines. Hence we need to set bits for both
the USBC ports.

BRANCH:None
TEST=emerge-nissa coreboot chromeos-bootimage. Flash the image on
nivviks board and verified USBC display is working on both the ports in
normal and inverted connections.

Signed-off-by: Usha P <usha.p@intel.com>
Change-Id: I219de6092ac9a9c773adbaa99f5a7d6196a2c937
Reviewed-on: https://review.coreboot.org/c/coreboot/+/62731
Reviewed-by: Rizwan Qureshi <rizwan.qureshi@intel.com>
Reviewed-by: Reka Norman <rekanorman@chromium.org>
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/google/brya/variants/nivviks/overridetree.cb

@@ -9,6 +9,15 @@ end
 chip soc/intel/alderlake
 	register "sagv" = "SaGv_Enabled"
 
+	# SOC Aux orientation override:
+	# This is a bitfield that corresponds to up to 4 TCSS ports.
+	# Bits (0,1) allocated for TCSS Port1 configuration and Bits (2,3)for TCSS Port2.
+	# TcssAuxOri = 0101b
+	# Bit0,Bit2 set to "1" indicates no retimer on USBC Ports
+	# Bit1,Bit3 set to "0" indicates Aux lines are not swapped on the
+	# motherboard to USBC connector
+	register "TcssAuxOri" = "5"
+
 	register "typec_aux_bias_pads[0]" = "{.pad_auxp_dc = GPP_E22, .pad_auxn_dc = GPP_E23}"
 	register "typec_aux_bias_pads[1]" = "{.pad_auxp_dc = GPP_A21, .pad_auxn_dc = GPP_A22}"