spi_mpc83xx: handle other Freescale processors

With this patch we'll able to select spi_mpc83xx driver on the MPC86xx
platforms.  Let the driver depend on FSL_SOC, so we don't have to worry
about Kconfig anymore.

Also remove the "experimental" dependency, the driver has been tested to
work on a various hardware, and surely not experimental anymore.

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Cc: Kumar Gala <galak@gate.crashing.org>
Cc: David Brownell <david-b@pacbell.net>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/spi/Kconfig

@@ -140,16 +140,14 @@ config SPI_MPC52xx_PSC
 	  Controller in master SPI mode.
 
 config SPI_MPC83xx
-	tristate "Freescale MPC83xx/QUICC Engine SPI controller"
-	depends on (PPC_83xx || QUICC_ENGINE) && EXPERIMENTAL
+	tristate "Freescale MPC8xxx SPI controller"
+	depends on FSL_SOC
 	help
-	  This enables using the Freescale MPC83xx and QUICC Engine SPI
-	  controllers in master mode.
+	  This enables using the Freescale MPC8xxx SPI controllers in master
+	  mode.
 
-	  Note, this driver uniquely supports the SPI controller on the MPC83xx
-	  family of PowerPC processors, plus processors with QUICC Engine
-	  technology. This driver uses a simple set of shift registers for data
-	  (opposed to the CPM based descriptor model).
+	  This driver uses a simple set of shift registers for data (opposed
+	  to the CPM based descriptor model).
 
 config SPI_OMAP_UWIRE
 	tristate "OMAP1 MicroWire"