Better OpenOCD config

[maxgerhardt]

The OpenOCD config creates all the CPU cores in accordance to their AP number

spresense/sdk/tools/cxd5602.cfg

Lines 28 to 30 in 556c296

	# Create each CPU targets
	target create $_CHIPNAME.cpu3 cortex_m -dap $_CHIPNAME.dap -ap-num 3

However, this makes it incompatible with targets using HLA_SWD like the ST-Link, who can only access the first AP (=0). Other config files have a check for this

https://github.com/openocd-org/openocd/blob/573a39b36cf133bb7403b12337301a5616112f1a/tcl/target/stm32mp13x.cfg#L6-L47

And I think it should be included here too.

[SPRESENSE]

Hi @maxgerhardt san
Thanks for the advice. If you submit a pull request, we would like to merge it.
Thanks