cpu: Add MPC83xx CPU driver

Add a CPU driver for the MPC83xx architecture.

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

arch/powerpc/cpu/mpc83xx/cpu.c

@@ -25,6 +25,7 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
+#ifndef CONFIG_CPU_MPC83XX
 int checkcpu(void)
 {
 	volatile immap_t *immr;
@@ -114,6 +115,7 @@ int checkcpu(void)
 
 	return 0;
 }
+#endif
 
 #ifndef CONFIG_SYSRESET
 int

arch/powerpc/cpu/mpc83xx/cpu_init.c

@@ -464,6 +464,7 @@ static int print_83xx_arb_event(int force)
 }
 #endif /* CONFIG_DISPLAY_AER_xxxx */
 
+#ifndef CONFIG_CPU_MPC83XX
 /*
  * Figure out the cause of the reset
  */
@@ -505,3 +506,4 @@ int prt_83xx_rsr(void)
 
 	return 0;
 }
+#endif