backports: Refresh patches on kernel 4.20-rc4

This patch was merged upstream and removed from backports:
 * patches/0090-use-skb_pad.patch

This patch was manually modified:
 * patches/0025-usb-sg/usbnet.patch

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
18 files changed