spi: mpc8xx: Migrate to DM_SPI

Drop non-dm code and migrate into DM_SPI.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
[jagan: Move config menu in DM_SPI area]
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
index 4a8a38b..a7bb5b3 100644
--- a/drivers/spi/Kconfig
+++ b/drivers/spi/Kconfig
@@ -124,6 +124,12 @@
 	  This driver can be used to access the SPI NOR flash chips on
 	  Amlogic Meson SoCs.
 
+config MPC8XX_SPI
+	bool "MPC8XX SPI Driver"
+	depends on MPC8xx
+	help
+	  Enable support for SPI on MPC8XX
+
 config MT7621_SPI
 	bool "MediaTek MT7621 SPI driver"
 	depends on ARCH_MT7620
@@ -343,12 +349,6 @@
 	help
 	  Enable support for SPI on LPC32xx
 
-config MPC8XX_SPI
-	bool "MPC8XX SPI Driver"
-	depends on MPC8xx
-	help
-	  Enable support for SPI on MPC8XX
-
 config MPC8XXX_SPI
 	bool "MPC8XXX SPI Driver"
 	help