Bluetooth: Controller: Refactor BT_CTLR_LE_ENC implementation

Refactor reused function in BT_CTLR_LE_ENC feature.

Signed-off-by: Vinayak Kariappa Chettimada <vich@nordicsemi.no>
(cherry picked from commit fe205a598e38549bd16620eecaef0431cfcc1b84)
Signed-off-by: Vinayak Kariappa Chettimada <vich@nordicsemi.no>
1 file changed