uwb_core: Fixes logic of default UWB chip id

When UWB chip-id is default, then the first available chip should be
picked. Otherwise, the specified chip-id should be picked. The existing
code got the logic reversed.

Test: mmm .
Test: cargo clippy
Change-Id: I82b074cb7ee0191ff3e73be6fd5fa680d5103766
1 file changed