svf: new command line options -noreset and -addcycles

-noreset: when using several SVF input files in a sequence it is not always
 desireable to have a JTAG reset between the execution of the files.
 The -noreset option skips this unwanted reset.

-addcycles <x>: some tests rely on a certain number of extra clock cycles
 between the actual JTAG commands. The -addcycles option injects a number
 x cycles after each SDR instruction.

Signed-off-by: Kai Schmitz <kai.schmitz@advantest.com>
Change-Id: I31932d6041dbc803be00016cd0a4f23fb2e7dbe1
Reviewed-on: https://review.openocd.org/c/openocd/+/7433
Tested-by: jenkins
Reviewed-by: Antonio Borneo <borneo.antonio@gmail.com>

doc/openocd.texi

@@ -11433,7 +11433,8 @@ In a debug session using JTAG for its transport protocol,
 OpenOCD supports running such test files.
 
 @deffn {Command} {svf} @file{filename} [@option{-tap @var{tapname}}] [@option{[-]quiet}] @
-                     [@option{[-]nil}] [@option{[-]progress}] [@option{[-]ignore_error}]
+                     [@option{[-]nil}] [@option{[-]progress}] [@option{[-]ignore_error}] @
+                     [@option{-noreset}] [@option{-addcycles @var{cyclecount}}]
 This issues a JTAG reset (Test-Logic-Reset) and then
 runs the SVF script from @file{filename}.
 
@@ -11452,6 +11453,10 @@ on the real interface;
 @item @option{[-]progress} enable progress indication;
 @item @option{[-]ignore_error} continue execution despite TDO check
 errors.
+@item @option{-noreset} omit JTAG reset (Test-Logic-Reset) before executing
+content of the SVF file;
+@item @option{-addcycles @var{cyclecount}} inject @var{cyclecount} number of
+additional TCLK cycles after each SDR scan instruction;
 @end itemize
 @end deffn