read_sdc use cmd_mode

Signed-off-by: James Cherry <cherry@parallaxsw.com>

Author: jjcherry56

doc/ChangeLog.txt

@@ -9,7 +9,7 @@ See ApiChangeLog.txt for changes to the STA api.
 
 The write_sdc command supports a -mode argument.
 
-  read_sdc [-mode mode]
+  write_sdc [-mode mode]
 
 2026/03/23
 ----------

sdc/Sdc.tcl

@@ -45,7 +45,7 @@ proc_redirect read_sdc {
 
   if { [info exists keys(-mode)] } {
     set mode_name $keys(-mode)
-    set prev_mode [cmd_mode_name]
+    set prev_mode [cmd_mode]
     try {
       set_cmd_mode $mode_name
       include_file $filename $echo 0