spi: mpc8xxx: Convert to DM

Support DM in the MPC8xxx SPI driver, and remove the legacy SPI
interface.

Signed-off-by: Mario Six <mario.six@gdsys.cc>
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
index c3a829d..1bc6c99 100644
--- a/drivers/spi/Kconfig
+++ b/drivers/spi/Kconfig
@@ -131,6 +131,11 @@
 	help
 	  Enable support for SPI on MPC8XX
 
+config MPC8XXX_SPI
+	bool "MPC8XXX SPI Driver"
+	help
+	  Enable support for SPI on the MPC8XXX PowerPC SoCs.
+
 config MT7621_SPI
 	bool "MediaTek MT7621 SPI driver"
 	depends on SOC_MT7628
@@ -364,11 +369,6 @@
 	help
 	  Enable support for SPI on LPC32xx
 
-config MPC8XXX_SPI
-	bool "MPC8XXX SPI Driver"
-	help
-	  Enable support for SPI on the MPC8XXX PowerPC SoCs.
-
 config MXC_SPI
 	bool "MXC SPI Driver"
 	help