cfg: Added Nucleo-F411RE board config.

It supports STLink/V2-1 debug adapter.

Change-Id: Ifbc610cd68ec929608369e69d0b1395fe04956cd
Signed-off-by: Nemui Trinomius <nemuisan_kawausogasuki@live.jp>
Reviewed-on: http://openocd.zylin.com/2259
Tested-by: jenkins
Reviewed-by: Paul Fertser <fercerpav@gmail.com>

tcl/board/st_nucleo_f411re.cfg

@@ -0,0 +1,11 @@
+# This is an ST NUCLEO F411RE board with a single STM32F411RET6 chip.
+# http://www.st.com/web/catalog/tools/FM116/SC959/SS1532/LN1847/PF260320
+
+source [find interface/stlink-v2-1.cfg]
+
+transport select hla_swd
+
+source [find target/stm32f4x.cfg]
+
+# use hardware reset, connect under reset
+reset_config srst_only srst_nogate