tcl: replace the deprecated commands with "adapter ..."

Avoid annoying "deprecated" messages while running the scripts
distributed with OpenOCD code.
Change automatically created with commands
	sed -i 's/adapter_khz/adapter speed/g' $(find tcl/ -type f)
	sed -i 's/adapter_nsrst_delay/adapter srst delay/g' $(find tcl/ -type f)
	sed -i 's/adapter_nsrst_assert_width/adapter srst pulse_width/g' $(find tcl/ -type f)

Minor indentation issue fixed manually in
	tcl/board/at91sam9g20-ek.cfg
	tcl/target/at91sam9260_ext_RAM_ext_flash.cfg

Change-Id: I425fd56c0c88cd6b06124621306eeb89166dfe71
Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
Reviewed-on: http://openocd.zylin.com/5284
Tested-by: jenkins
Reviewed-by: Oleksij Rempel <linux@rempel-privat.de>

tcl/board/icnova_sam9g45_sodimm.cfg

@@ -15,7 +15,7 @@ source [find target/at91sam9g45.cfg]
 # Set reset type.
 # reset_config trst_and_srst
 
-# adapter_nsrst_delay 200
+# adapter srst delay 200
 # jtag_ntrst_delay 200
 
 
@@ -58,7 +58,7 @@ proc at91sam9g45_start { } {
 
 	arm7_9 fast_memory_access disable
     # Slow-speed oscillator enabled at reset, so run jtag speed slow.
-	adapter_khz 4
+	adapter speed 4
     # Make sure processor is halted, or error will result in following steps.
 	halt
 	wait_halt 10000
@@ -117,7 +117,7 @@ proc at91sam9g45_init { } {
 
 	# Switch over to adaptive clocking.
 
-	adapter_khz 6000
+	adapter speed 6000
 
 	# Enable faster DCC downloads.