bluetooth: ll_sw: nrf5: Apply workaround for anomalies only when needed

Workaround for nRF52 anomalies 102, 106, and 107 was applied also for
SoCs that were not affected with those, namely nRF52811 and nRF52840.
Since the side effect of this workaround is reduction of sensitivity,
this was highly undesirable.
This commit uses dedicated functions provided by MDK for checking if
a given anomaly applies to the used SoC (and its actual revision) so
that the workaround is applied only when it is really needed.

Signed-off-by: Andrzej Głąbek <andrzej.glabek@nordicsemi.no>