drivers: net: Fix Kconfig indentation

Adjust indentation from spaces to tab (+optional two spaces) as in
coding style with command like:
    $ sed -e 's/^        /\t/' -i */Kconfig

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Acked-by: Kalle Valo <kvalo@codeaurora.org>
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/wireless/ath/ar5523/Kconfig

@@ -5,5 +5,5 @@ config AR5523
        select ATH_COMMON
        select FW_LOADER
        ---help---
-         This module add support for AR5523 based USB dongles such as D-Link
-         DWL-G132, Netgear WPN111 and many more.
+	 This module add support for AR5523 based USB dongles such as D-Link
+	 DWL-G132, Netgear WPN111 and many more.