soc: atmel: fix number of wait states #132908

Job	Run time
twister-build-prep	2m 30s
twister-build (1)	24m 57s
twister-build (2)	27m 19s
twister-build (3)	24m 52s
twister-build (4)	28m 52s
twister-build (5)	16m 29s
twister-build (6)	18m 15s
twister-build (7)	21m 31s
Publish Unit Tests Results	16s
Check Twister Status / all jobs passed	1s
	2h 45m 2s

Provide feedback