Staging: rtl8188eu: os_dep: Use %s and __func__ in strings

Fix following checkpatch.pl warnings by using %s and __func__
in strings instead of function names.

WARNING: Prefer using '"%s...", __func__' to using 'rtw_report_sec_ie', this function's name, in a string
and other similar warning.

Signed-off-by: Puranjay Mohan <puranjay12@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>