Bluetooth: hci_ath: Remove un-used variable

Compilation failed due to un-used variable when
CONFIG_BT_HCIUART_ATH3K is set to true.

Change-Id: Idf6f38f64704d979dd6d3443f4a0bd792e00553e
Signed-off-by: Ram Mohan Korukonda <rkorukon@codeaurora.org>
1 file changed