mpc83xx: Introduce ARCH_MPC834*

Replace CONFIG_MPC834* with proper CONFIG_ARCH_MPC834* Kconfig options.

Signed-off-by: Mario Six <mario.six@gdsys.cc>
diff --git a/include/usb/ehci-ci.h b/include/usb/ehci-ci.h
index e4579a5..efb2eec 100644
--- a/include/usb/ehci-ci.h
+++ b/include/usb/ehci-ci.h
@@ -147,7 +147,7 @@
 
 #if defined(CONFIG_MPC83xx)
 #define CONFIG_SYS_FSL_USB1_ADDR CONFIG_SYS_MPC83xx_USB1_ADDR
-#if defined(CONFIG_MPC834x)
+#if defined(CONFIG_ARCH_MPC834X)
 #define CONFIG_SYS_FSL_USB2_ADDR CONFIG_SYS_MPC83xx_USB2_ADDR
 #else
 #define CONFIG_SYS_FSL_USB2_ADDR	0