staging: rtl8192u: Fix spelling mistake athros -> Atheros and fix grammer

There is a spellig mistake, correct it and fix capital letter on the
proper noun. Also fix the grammar.
Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Link: https://lore.kernel.org/r/20221004150944.148157-1-colin.i.king@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8192u/ieee80211/ieee80211_rx.c

@@ -1806,7 +1806,7 @@ int ieee80211_parse_info_param(struct ieee80211_device *ieee,
 				info_element->data[0] == 0x00 &&
 				info_element->data[1] == 0x13 &&
 				info_element->data[2] == 0x74)) {
-				netdev_dbg(ieee->dev, "========> athros AP is exist\n");
+				netdev_dbg(ieee->dev, "========> Atheros AP exists\n");
 				network->atheros_cap_exist = true;
 			} else
 				network->atheros_cap_exist = false;