nimble: add sysconfig for enabling additional PHYs #73

Job	Run time
Build GCC test target (ubuntu-latest, 12.2.Rel1)	18s
Build GCC test target (ubuntu-latest, 12.2.Rel1)	3m 18s
Build GCC test target (ubuntu-latest, 11.3.Rel1)	3m 39s
Build GCC test target (ubuntu-latest, 11.3.Rel1)	3m 39s
Build GCC test target (ubuntu-latest, 10.3-2021.10)	3m 36s
Build GCC test target (ubuntu-latest, 10.3-2021.10)	3m 36s
Build GCC test target (ubuntu-latest, 9-2020-q2)	3m 34s
Build GCC test target (ubuntu-latest, 9-2020-q2)	3m 34s
Build GCC test target (ubuntu-latest, 8-2019-q3)	4m 34s
Build GCC test target (ubuntu-latest, 8-2019-q3)	4m 34s
	34m 22s

Provide feedback