cpu: Add MPC83xx CPU driver

Add a CPU driver for the MPC83xx architecture.

Signed-off-by: Mario Six <mario.six@gdsys.cc>

drivers/cpu/Kconfig

@@ -6,3 +6,10 @@ config CPU
 	  multiple CPUs, then normally have to be set up in U-Boot so that
 	  they can work correctly in the OS. This provides a framework for
 	  finding out information about available CPUs and making changes.
+
+config CPU_MPC83XX
+	bool "Enable MPC83xx CPU driver"
+	depends on CPU
+	select CLK_MPC83XX
+	help
+	  Support CPU cores for SoCs of the MPC83xx series.