nimble/controller: Improve ext connection creation
nimble/controller: Improve ext connection creation

This patch make sure to continue scanning while waiting for AUX_ADV_IND
or when got invalid ext advertising data.

X-Original-Commit: 17395ab36fb2c52f3ede7012359af09fe134f971

apache/mynewt-nimble,apache/mynewt-nimble,apache/mynewt-nimble,apache/mynewt-nimble,apache/mynewt-nimble