Supply default reset_config statement to make target scripts useful standalone...

Supply default reset_config statement to make target scripts useful standalone and provide sensible default

tcl/target/imx31.cfg

 # imx31 config
 #
 
-reset_config trst_and_srst
+reset_config trst_and_srst srst_nogate
 
 if { [info exists CHIPNAME] } {
    set  _CHIPNAME $CHIPNAME

tcl/target/imx35.cfg

 # imx35 config
 #
 
+reset_config trst_and_srst srst_nogate
+
+
 if { [info exists CHIPNAME] } {
    set  _CHIPNAME $CHIPNAME
 } else {