tcl/target: Prepare FM4 MB9BFxxx family

It is found on the SK-FM4-U120-9B560-MEM V1.1.0 among others.

Change-Id: I4c708c9391e954cbbc8d0860a2a2dbd264aea865
Signed-off-by: Andreas Färber <afaerber@suse.de>
Reviewed-on: http://openocd.zylin.com/3008
Tested-by: jenkins
Reviewed-by: Freddie Chopin <freddie.chopin@gmail.com>

tcl/target/fm4_mb9bf.cfg

@@ -0,0 +1,15 @@
+#
+# Spansion FM4 MB9BFxxx (ARM Cortex-M4)
+#
+
+source [find target/fm4.cfg]
+
+# MB9BF566 M/N/R have 32 KB SRAM0
+if { [info exists WORKAREASIZE] } {
+	set _WORKAREASIZE $WORKAREASIZE
+} else {
+	set _WORKAREASIZE 0x8000
+}
+
+$_TARGETNAME configure -work-area-phys [expr 0x20000000 - $_WORKAREASIZE] \
+                       -work-area-size $_WORKAREASIZE -work-area-backup 0