soc: qcom: pmic_glink: remove redundant calculation of svid

gcc with W=1 reports
drivers/soc/qcom/pmic_glink_altmode.c:223:13: error: variable ‘svid’ set but not used [-Werror=unused-but-set-variable]
  223 |         u16 svid;

From reviewing the code, the setting of alt_port->svid does the same calculation.
Both are not needed.  For debuggablity, keep the setting of local svid.
Signed-off-by: Tom Rix <trix@redhat.com>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230206135831.1794583-1-trix@redhat.com

drivers/soc/qcom/pmic_glink_altmode.c

@@ -248,7 +248,7 @@ static void pmic_glink_altmode_sc8180xp_notify(struct pmic_glink_altmode *altmod
 
 	alt_port = &altmode->ports[port];
 	alt_port->orientation = pmic_glink_altmode_orientation(orientation);
-	alt_port->svid = mux == 2 ? USB_TYPEC_DP_SID : 0;
+	alt_port->svid = svid;
 	alt_port->mode = mode;
 	alt_port->hpd_state = hpd_state;
 	alt_port->hpd_irq = hpd_irq;