srst pulls trst according to Freescale docs for i.mx27

git-svn-id: svn://svn.berlios.de/openocd/trunk@2492 b42882b7-edfa-0310-969c-e2dbd0fdcd60

tcl/target/imx27.cfg

-#use combined on interfaces or targets that can't set TRST/SRST separately
-reset_config trst_and_srst
+# page 3-34 of "MCIMC27 Multimedia Applications Processor Reference Manual, Rev 0.3"
+# SRST pulls TRST
+#
+# Without setting these options correctly you'll see all sorts
+# of weird errors, e.g. MOE=0xe, invalid cpsr values, reset
+# failing, etc.
+reset_config srst_only srst_pulls_trst
 
 if { [info exists CHIPNAME] } {	
    set  _CHIPNAME $CHIPNAME