Lpc watchdog: restart to bootloader prior to the full init process

[sosthene-nitrokey]

Otherwise if there is a repeated crash during the boot process it will just lead to a very slow bootloop and never go back to the bootloader

[nitrokey-ci]

No significant changes.

Insignifcant changes

metric	value		change
binary-size-nk3am	1,494,776	⚪	+0 (+0.00%)
binary-size-nk3am-test	1,869,414	⚪	+0 (+0.00%)
binary-size-nk3xn	537,224	✅	-64 (-0.01%)
binary-size-nk3xn-test	537,256	✅	-64 (-0.01%)
binary-size-nkpk	675,969	⚪	+0 (+0.00%)

[robin-nitrokey]

I tried a similar change and it did not fix the problem for me. I’ll give it another try.