staging: rtl8188eu: correct code alignment

This patch fixes incorrect code alignment due to mixed indenting with
spaces and tabs. This patch was detected using coccinelle and
silences the following warnings:

drivers/staging/rtl8188eu/core/rtw_io.c:297:2-29: code aligned with following code on line 299
drivers/staging/rtl8188eu/core/rtw_mlme_ext.c:4420:2-29: code aligned with following code on line 4422
drivers/staging/rtl8188eu/os_dep/osdep_service.c:54:2-17: code aligned with following code on line 55
drivers/staging/rtl8188eu/os_dep/ioctl_linux.c:7229:2-17: code aligned with following code on line 7231

Signed-off-by: Teodora Baluta <teobaluta@gmail.com>
Reviewed-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>