staging: rtl8192u: r8192U_core: fix checkpatch permission warnings

Fix the following warnings:
Symbolic permissions are not preferred. Consider using octal permissions.

Signed-off-by: Xavier Roumegue <xroumegue@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
1 file changed