Patches for -stable to improve support for recent gcc versions

Hi Greg,

please apply the following patches.

to v4.4-stable and older:

cb36af3e48be sh: New gcc support to support gcc 8.1.0 for sh

to v4.9-stable and older:

009615ab7fd4 USB: serial: cp210x: use tcflag_t to fix incompatible pointer type to support gcc 7.3.0 for sparc

Copying Arnd - I can't get sparc images to compile with gcc 8.1.0. Any idea ?

Thanks, Guenter