staging: rtl8188eu: core: rtw_recv.c: Fix a tab indent issue

Fix a tab indent issue which removed warnings after compilation using
checkpatch.pl.

[WARNING]:No extra space at the beginning of a line.

Signed-off-by: Sanjana Sanikommu <sanjana99reddy99@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>