mpc83xx: Migrate arbiter config to Kconfig

Migrate the arbiter configuration to Kconfig.

Signed-off-by: Mario Six <mario.six@gdsys.cc>
diff --git a/configs/MPC837XERDB_defconfig b/configs/MPC837XERDB_defconfig
index 40eaf93..d43b364 100644
--- a/configs/MPC837XERDB_defconfig
+++ b/configs/MPC837XERDB_defconfig
@@ -104,6 +104,8 @@
 CONFIG_HID0_FINAL_EMCP=y
 CONFIG_HID0_FINAL_ICE=y
 CONFIG_HID2_HBE=y
+CONFIG_ACR_PIPE_DEP_4=y
+CONFIG_ACR_RPTCNT_4=y
 CONFIG_OF_BOARD_SETUP=y
 CONFIG_OF_STDOUT_VIA_ALIAS=y
 CONFIG_SYS_EXTRA_OPTIONS="PCIE"