target: stm32f0x: drop swj on swd only target

The datasheets for all STM32F0xx devices report that only SWD is
supported. No TDI/TDO pin is present.

Drop swj support.
Add swd transport.
Remove swd transport from the associated board files.

Change-Id: I65a08b6a441d794aa209cff8583a971d3546f49e
Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
Reviewed-on: https://review.openocd.org/c/openocd/+/9424
Reviewed-by: Ahmed Haoues <ahmed.haoues@st.com>
Tested-by: jenkins
Reviewed-by: Tomas Vanek <vanekt@fbl.cz>

tcl/board/st_nucleo_f0.cfg

@@ -10,8 +10,6 @@
 
 source [find interface/stlink.cfg]
 
-transport select swd
-
 source [find target/stm32f0x.cfg]
 
 reset_config srst_only

tcl/board/stm320518_eval_stlink.cfg

@@ -8,8 +8,6 @@
 
 source [find interface/stlink.cfg]
 
-transport select swd
-
 # increase working area to 8KB
 set WORKAREASIZE 0x2000
 

tcl/board/stm32f0discovery.cfg

@@ -5,8 +5,6 @@
 
 source [find interface/stlink.cfg]
 
-transport select swd
-
 set WORKAREASIZE 0x2000
 source [find target/stm32f0x.cfg]
 

tcl/target/stm32f0x.cfg

@@ -5,7 +5,8 @@
 #
 # stm32 devices support SWD transports only.
 #
-source [find target/swj-dp.tcl]
+transport select swd
+
 source [find mem_helper.tcl]
 
 if { [info exists CHIPNAME] } {
@@ -41,7 +42,7 @@ if { [info exists CPUTAPID] } {
    set _CPUTAPID 0x0bb11477
 }
 
-swj_newdap $_CHIPNAME cpu -irlen 4 -ircapture 0x1 -irmask 0xf -expected-id $_CPUTAPID
+swd newdap $_CHIPNAME cpu -expected-id $_CPUTAPID
 dap create $_CHIPNAME.dap -chain-position $_CHIPNAME.cpu
 
 set _TARGETNAME $_CHIPNAME.cpu