staging: rtl8723bs: fix typo of "mechanism" in comment

Fix typo s/mechansim/mechanism/
Signed-off-by: Antonio Borneo <antonio.borneo@st.com>
Link: https://lore.kernel.org/r/20191007154306.95827-2-antonio.borneo@st.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8723bs/hal/hal_btcoex.c

@@ -1315,7 +1315,7 @@ void EXhalbtcoutsrc_DisplayBtCoexInfo(PBTC_COEXIST pBtCoexist)
 
 /*
  * Description:
- *Run BT-Coexist mechansim or not
+ *Run BT-Coexist mechanism or not
  *
  */
 void hal_btcoex_SetBTCoexist(struct adapter *padapter, u8 bBtExist)