Possible issue detaching from IMXRT1062

[xobs]

There may be an issue when detaching from an IMXRT1062.

There is a report of failure to issue kill when attached to an IMXRT1062 on Farpatch: farpatch/farpatch#71

Specifically, the target goes away when executing this line:

blackmagic/src/target/cortexm.c

Lines 939 to 943 in e4da644

	/*
	* No reset seen yet, maybe as nRST is not connected, or device has TOPT_INHIBIT_NRST set.
	* Trigger reset by AIRCR.
	*/
	target_mem32_write32(target, CORTEXM_AIRCR, CORTEXM_AIRCR_VECTKEY | CORTEXM_AIRCR_SYSRESETREQ);

I am unable to replicate this issue myself, however there are some reports online of trouble issuing a SYSRESETREQ on an IMXRT:

• https://forum.pjrc.com/index.php?threads/t4-software-restart-procedure-and-freeram-function.57553/
• Software Reset not working with iMXRT device ARMmbed/DAPLink#969

[xobs]

This may be due to a missing efuse bit as documented at https://community.nxp.com/t5/i-MX-RT/RT1062-software-reset/m-p/1270292 though it's strange the target stops responding entirely.