[Backport v3.7-branch] soc: nxp: lpc55s69: Fix part number typo #143853

Job	Run time
twister-build-prep	11m 49s
twister-build (1)	26m 23s
twister-build (2)	28m 18s
twister-build (3)	37m 34s
twister-build (4)	30m 28s
twister-build (5)	25m 7s
twister-build (6)	23m 58s
Publish Unit Tests Results	10s
Check Twister Status / all jobs passed	3s
	3h 3m 50s

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