global: Migrate CONFIG_SYS_MPC8* symbols to the CFG_SYS namespace

Migrate all of COFIG_SYS_MPC* to the CFG_SYS namespace.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/arch/powerpc/cpu/mpc85xx/spl_minimal.c b/arch/powerpc/cpu/mpc85xx/spl_minimal.c
index bdd7338..47df3c2 100644
--- a/arch/powerpc/cpu/mpc85xx/spl_minimal.c
+++ b/arch/powerpc/cpu/mpc85xx/spl_minimal.c
@@ -15,7 +15,7 @@
 ulong cpu_init_f(void)
 {
 #ifdef CONFIG_SYS_INIT_L2_ADDR
-	ccsr_l2cache_t *l2cache = (void *)CONFIG_SYS_MPC85xx_L2_ADDR;
+	ccsr_l2cache_t *l2cache = (void *)CFG_SYS_MPC85xx_L2_ADDR;
 
 	out_be32(&l2cache->l2srbar0, CONFIG_SYS_INIT_L2_ADDR);