ath10k: remove unnecessary comparison of unsigned integer with < 0

There is no need to compare *ps_state_enable* with < 0 because
such variable is of type u8 (8 bits, unsigned), making it
impossible to hold a negative value.

Fix this by removing such comparison.

Addresses-Coverity-ID: 1473921 ("Unsigned compared against 0")
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/ath/ath10k/debug.c

@@ -2421,7 +2421,7 @@ static ssize_t ath10k_write_ps_state_enable(struct file *file,
 	if (kstrtou8_from_user(user_buf, count, 0, &ps_state_enable))
 		return -EINVAL;
 
-	if (ps_state_enable > 1 || ps_state_enable < 0)
+	if (ps_state_enable > 1)
 		return -EINVAL;
 
 	mutex_lock(&ar->conf_mutex);