lantiq: make patches apply

lantiq: make patches apply

The following patches are dropped because they are now upstreamed:
- 0002-gpio-stp-xway-Implement-get-callback.patch
  upstreamed with commit 5b9b2b5284f819 ("gpio: stp-xway: Implement get
  callback")
- 0027-01-net-phy-intel-xway-add-VR9-version-number.patch
  upstreamed with commit 5b73d9955fb4b0 ("net: phy: intel-xway: add VR9
  version number")
- 0027-02-net-phy-intel-xway-add-VR9-v1.1-phy-ids.patch
  upstreamed with commit f452518c982e57 ("net: phy: intel-xway: add VR9
  v1.1 phy ids")

The following patches were updated:
- 0018-MTD-nand-lots-of-xrx200-fixes.patch
  the mainline driver now resides in drivers/mtd/nand/raw/xway_nand.c
  (instead of drivers/mtd/nand/xway_nand.c)
- 0025-NET-MIPS-lantiq-adds-xrx200-net.patch
  the DMA API now requires a valid device to be passed to all operations
- 0028-NET-lantiq-various-etop-fixes.patch
  the DMA API now requires a valid device to be passed to all operations

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Mathias Kresin <dev@kresin.me>