tcl/target: Add Nordic nRF52 config

Base config without flash support for now.

Change-Id: I96a5b6ad35e00dc706177ea9dbdffc384ae7f62b
Signed-off-by: Andreas Färber <afaerber@suse.de>
Reviewed-on: http://openocd.zylin.com/3110
Tested-by: jenkins
Reviewed-by: Spencer Oliver <spen@spen-soft.co.uk>

tcl/target/nrf52.cfg

@@ -0,0 +1,28 @@
+#
+# Nordic nRF52 series: ARM Cortex-M4 @ 64 MHz
+#
+
+source [find target/swj-dp.tcl]
+
+if { [info exists CHIPNAME] } {
+	set _CHIPNAME $CHIPNAME
+} else {
+	set _CHIPNAME nrf52
+}
+
+if { [info exists CPUTAPID] } {
+	set _CPUTAPID $CPUTAPID
+} else {
+	set _CPUTAPID 0x2ba01477
+}
+
+swj_newdap $_CHIPNAME cpu -expected-id $_CPUTAPID
+
+set _TARGETNAME $_CHIPNAME.cpu
+target create $_TARGETNAME cortex_m -chain-position $_TARGETNAME
+
+adapter_khz 10000
+
+if { ![using_hla] } {
+	cortex_m reset_config sysresetreq
+}