ieee802154: cc13xx_cc26xx: workaround for issue in ti driver

This is a temporary workaround for an issue in TI's RF Driver
API. A subsequent release of the SimpleLink SDK will mitigate
the need for it and it can be reverted when hal/ti receives
that update.

Fixes #29418

Signed-off-by: Christopher Friedt <chrisfriedt@gmail.com>