rtlwifi: remove redundant statement found by static checker

smatch reports "rtl_is_special_data() warn: inconsistent indenting", but
it is an obvious redundant statement so remove it.

Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Acked-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>