tcl/target: Add LPC4357 config

Reuse the flashless LPC4350 as base and amend it as necessary.
The LPC43x7 have 2x 512 KB of flash.

Change-Id: Ia7ffbc7101023479971984b839f171ed4be6b089
Signed-off-by: Andreas Färber <afaerber@suse.de>
Reviewed-on: http://openocd.zylin.com/3037
Tested-by: jenkins
Reviewed-by: Freddie Chopin <freddie.chopin@gmail.com>

tcl/target/lpc4350.cfg

@@ -51,6 +51,15 @@ if { [using_jtag] } {
 	target create $_CHIPNAME.m0 cortex_m -chain-position $_CHIPNAME.m0
 }
 
+# LPC4350 has 96+32 KB SRAM
+if { [info exists WORKAREASIZE] } {
+	set _WORKAREASIZE $WORKAREASIZE
+} else {
+	set _WORKAREASIZE 0x20000
+}
+$_CHIPNAME.m4 configure -work-area-phys 0x10000000 \
+			-work-area-size $_WORKAREASIZE -work-area-backup 0
+
 if {![using_hla]} {
    # on this CPU we should use VECTRESET to perform a soft reset and
    # manually reset the periphery