KS869x: add new target

This patch adds Micrel's KS869x target. The configuration was taken from
http://www.mmnt.net/db/0/0/www.micrel.com/ethernet/8695 - Micrel's
FTP server i.e. their OpenOCD 7.0 package.

The only change compared to the original file is the removal of
reset configuration, as it belongs to the board configuration.

Change-Id: Ic8509aa5fe5ce3166a3129e1c055280a3b2b9312
Signed-off-by: Yegor Yefremov <yegorslists@googlemail.com>
Reviewed-on: http://openocd.zylin.com/2125
Tested-by: jenkins
Reviewed-by: Freddie Chopin <freddie.chopin@gmail.com>

tcl/target/ks869x.cfg

@@ -0,0 +1,34 @@
+# ARM920T CPU
+
+if { [info exists CHIPNAME] } {
+   set  _CHIPNAME $CHIPNAME
+} else {
+   set  _CHIPNAME ks869x
+}
+
+if { [info exists ENDIAN] } {
+   set  _ENDIAN $ENDIAN
+} else {
+   set  _ENDIAN little
+}
+
+if { [info exists CPUTAPID] } {
+   set  _CPUTAPID $CPUTAPID
+} else {
+   set  _CPUTAPID 0x00922f0f
+}
+
+adapter_khz 6000
+
+# jtag scan chain
+jtag newtap $_CHIPNAME cpu -irlen 4 -ircapture 0x1 -irmask 0xf -expected-id $_CPUTAPID
+
+set _TARGETNAME $_CHIPNAME.cpu
+
+target create $_TARGETNAME arm920t -endian $_ENDIAN -chain-position $_TARGETNAME -variant arm920t
+
+$_TARGETNAME configure -work-area-phys 0x20000 -work-area-size 0x20000 -work-area-backup 0
+
+# speed up memory downloads
+arm7_9 fast_memory_access enable
+arm7_9 dcc_downloads enable