/bin/wifi:  Delete old band's options when switching bands on Camaro.

Fixes b/23766883...again. The original fix [1] only applied to 'wifi
set'.  This also fixes it for 'wifi setclient'.

Change-Id: If0d041169c8d20b6999225e68ebffaa9c51d8a98
1:  go/fibercl/66694; commit 540fa60391f6d98308746ff83ffbfa03b5d651bd
1 file changed