mpc83xx: Introduce ARCH_MPC830*

Replace CONFIG_MPC830* with proper CONFIG_ARCH_MPC830* Kconfig options.

Signed-off-by: Mario Six <mario.six@gdsys.cc>
diff --git a/arch/powerpc/include/asm/fsl_lbc.h b/arch/powerpc/include/asm/fsl_lbc.h
index b076d5e..cf89e18 100644
--- a/arch/powerpc/include/asm/fsl_lbc.h
+++ b/arch/powerpc/include/asm/fsl_lbc.h
@@ -133,7 +133,7 @@
 #define OR_GPCM_EHTR_SHIFT		1
 #define OR_GPCM_EHTR_CLEAR		0x00000000
 #define OR_GPCM_EHTR_SET		0x00000002
-#if !defined(CONFIG_MPC8308)
+#if !defined(CONFIG_ARCH_MPC8308)
 #define OR_GPCM_EAD			0x00000001
 #define OR_GPCM_EAD_SHIFT		0
 #endif