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/hitex_lpc2929.cfg

@@ -2,12 +2,12 @@
 # http://www.hitex.com/
 
 # Delays on reset lines
-adapter_nsrst_delay 50
+adapter srst delay 50
 jtag_ntrst_delay 1
 
 # Maximum of 1/8 of clock frequency (XTAL = 16 MHz).
 # Adaptive clocking through RTCK is not supported.
-adapter_khz 2000
+adapter speed 2000
 
 # Target device: LPC29xx with ETB
 # The following variables are used by the LPC2900 script:
@@ -24,7 +24,7 @@ $_TARGETNAME configure -work-area-phys 0x58000000 -work-area-size 0x10000 -work-
 # Event handlers
 $_TARGETNAME configure -event reset-start {
   # Back to the slow JTAG clock
-  adapter_khz 2000
+  adapter speed 2000
 }
 
 # External 16-bit flash at chip select CS7 (SST39VF3201-70, 4 MiB)
@@ -46,7 +46,7 @@ $_TARGETNAME configure -event reset-init {
   mww 0xFFFF8070 0x02000000     ;# SYS_CLK_CONF: PLL
 
   # Increase JTAG speed
-  adapter_khz 6000
+  adapter speed 6000
 
   # Enable external memory bus (16-bit SRAM at CS6, 16-bit flash at CS7)
   mww 0xE0001138 0x0000001F     ;# P1.14 = D0