Staging: rtl8187se: Rename staging driver to avoid name conflict with mainline driver

Now that active development has begun on a mainline version of
a driver for the RTL8187SE that should be called rtl8187se, there
is a conflict with the driver in staging with the same name.

To solve the conflict, rename the driver in staging to r8187se.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>