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/MPC8308RDB_defconfig b/configs/MPC8308RDB_defconfig
index 9be5155..00feacc 100644
--- a/configs/MPC8308RDB_defconfig
+++ b/configs/MPC8308RDB_defconfig
@@ -70,6 +70,8 @@
 CONFIG_SICR_GPIOSEL_IEEE1588=y
 CONFIG_SICR_TMSOBI1_2_5_V=y
 CONFIG_SICR_TMSOBI2_2_5_V=y
+CONFIG_ACR_PIPE_DEP_4=y
+CONFIG_ACR_RPTCNT_4=y
 CONFIG_FIT=y
 CONFIG_FIT_VERBOSE=y
 CONFIG_OF_BOARD_SETUP=y