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/arch/powerpc/cpu/mpc83xx/Kconfig b/arch/powerpc/cpu/mpc83xx/Kconfig
index 1b9402e..6cca45e 100644
--- a/arch/powerpc/cpu/mpc83xx/Kconfig
+++ b/arch/powerpc/cpu/mpc83xx/Kconfig
@@ -14,6 +14,7 @@
 
 config TARGET_SBC8349
 	bool "Support sbc8349"
+	select ARCH_MPC8349
 
 config TARGET_VE8313
 	bool "Support ve8313"
@@ -21,6 +22,7 @@
 
 config TARGET_VME8349
 	bool "Support vme8349"
+	select ARCH_MPC8349
 
 config TARGET_MPC8308RDB
 	bool "Support MPC8308RDB"
@@ -49,6 +51,7 @@
 
 config TARGET_MPC8349EMDS
 	bool "Support MPC8349EMDS"
+	select ARCH_MPC8349
 	select BOARD_EARLY_INIT_F
 	select SYS_FSL_DDR
 	select SYS_FSL_DDR_BE
@@ -56,6 +59,7 @@
 
 config TARGET_MPC8349ITX
 	bool "Support MPC8349ITX"
+	select ARCH_MPC8349
 	imply CMD_IRQ
 
 config TARGET_MPC837XEMDS
@@ -96,6 +100,7 @@
 
 config TARGET_TQM834X
 	bool "Support TQM834x"
+	select ARCH_MPC8349
 
 config TARGET_HRCON
 	bool "Support hrcon"
@@ -135,6 +140,13 @@
 config ARCH_MPC832X
 	bool
 
+config ARCH_MPC834X
+	bool
+
+config ARCH_MPC8349
+	bool
+	select ARCH_MPC834X
+
 source "board/esd/vme8349/Kconfig"
 source "board/freescale/mpc8308rdb/Kconfig"
 source "board/freescale/mpc8313erdb/Kconfig"