tcl: update scripts after "jtag_reset" got deprecated

Avoid annoying "deprecated" messages in the scripts
distributed with OpenOCD code.

Change-Id: I82d27cd420db30f0653efbd286a627ef56a8c1fd
Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
Reviewed-on: http://openocd.zylin.com/5287
Tested-by: jenkins
Reviewed-by: Tomas Vanek <vanekt@fbl.cz>

tcl/target/pxa255.cfg

@@ -38,11 +38,11 @@ reset_config trst_and_srst separate srst_nogate
 # reset processing that works with PXA
 proc init_reset {mode} {
 	# assert both resets; equivalent to power-on reset
-	jtag_reset 1 1
+	adapter assert trst assert srst
 
 	# drop TRST after at least 32 cycles
 	sleep 1
-	jtag_reset 0 1
+	adapter deassert trst assert srst
 
 	# minimum 32 TCK cycles to wake up the controller
 	runtest 50
@@ -51,7 +51,7 @@ proc init_reset {mode} {
 	jtag arp_init
 
 	# ... and take it out of reset
-	jtag_reset 0 0
+	adapter deassert trst deassert srst
 }
 
 proc jtag_init {} {