mpc8308: Migrate system io config to Kconfig

Migrate the system IO configuration setting to Kconfig.

Signed-off-by: Mario Six <mario.six@gdsys.cc>
diff --git a/configs/hrcon_dh_defconfig b/configs/hrcon_dh_defconfig
index e9d427b..5de0eaa 100644
--- a/configs/hrcon_dh_defconfig
+++ b/configs/hrcon_dh_defconfig
@@ -58,6 +58,15 @@
 CONFIG_HID0_FINAL_DPM=y
 CONFIG_HID0_FINAL_ICE=y
 CONFIG_HID2_HBE=y
+CONFIG_SICR_ETSEC1_A_TSEC_GTX_CLK125=y
+CONFIG_SICR_GPIO_A_GPIO=y
+CONFIG_SICR_GPIO_B_GPIO=y
+CONFIG_SICR_IEEE1588_A_GPIO=y
+CONFIG_SICR_GTM_GPIO=y
+CONFIG_SICR_ETSEC2_GPIO=y
+CONFIG_SICR_GPIOSEL_IEEE1588=y
+CONFIG_SICR_TMSOBI1_2_5_V=y
+CONFIG_SICR_TMSOBI2_2_5_V=y
 CONFIG_CMD_IOLOOP=y
 CONFIG_FIT=y
 CONFIG_FIT_VERBOSE=y