rtlwifi: btcoexist: Fix if == else warnings in halbtc8723b1ant.c

rtlwifi: btcoexist: Fix if == else warnings in halbtc8723b1ant.c

The 0-DAY kernel test infrastructure reports the following:
drivers/net/wireless/realtek/rtlwifi/btcoexist/halbtc8723b1ant.c:1875:2-4: WARNING: possible condition with no effect (if == else)
drivers/net/wireless/realtek/rtlwifi/btcoexist/halbtc8723b1ant.c:2253:3-5: WARNING: possible condition with no effect (if == else)

Reported-by: [email protected]
Signed-off-by: Larry Finger <[email protected]>
Cc: Julia Lawall <[email protected]>
Signed-off-by: Kalle Valo <[email protected]>