MIPS: Alchemy: Au1300 SoC support

Add basic support for the Au1300 variant(s):
- New GPIO/Interrupt controller
- DBDMA ids
- USB setup
- MMC support
- enable various PSC drivers
- detection code.

Signed-off-by: Manuel Lauss <manuel.lauss@googlemail.com>
To: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/2866/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

drivers/spi/Kconfig

@@ -87,12 +87,12 @@ config SPI_BFIN_SPORT
 	  Enable support for a SPI bus via the Blackfin SPORT peripheral.
 
 config SPI_AU1550
-	tristate "Au1550/Au12x0 SPI Controller"
+	tristate "Au1550/Au1200/Au1300 SPI Controller"
 	depends on MIPS_ALCHEMY && EXPERIMENTAL
 	select SPI_BITBANG
 	help
 	  If you say yes to this option, support will be included for the
-	  Au1550 SPI controller (may also work with Au1200,Au1210,Au1250).
+	  PSC SPI controller found on Au1550, Au1200 and Au1300 series.
 
 config SPI_BITBANG
 	tristate "Utilities for Bitbanging SPI masters"