Unable to load module mmc:block (ueventd)

Products Support HiKey 960
#1

I built kernel Image in default settings.
common/arch/arm64/configs/gki_defconfig

CONFIG_MODULES=y
CONFIG_MODULE_UNLOAD=y
CONFIG_MODVERSIONS=y

common/arch/arm64/configs/hikey960_gki.fragment

CONFIG_MMC_BLOCK=m
CONFIG_MMC_BLOCK_MINORS=64
CONFIG_MMC_ARMMMCI=m
CONFIG_MMC_SPI=m
CONFIG_MMC_DW=m
CONFIG_MMC_DW_EXYNOS=m
CONFIG_MMC_DW_K3=m

And I inserted microSD card to microSD slot.
dmesg

[ 2016.688164] mmc_host mmc1: Bus speed (slot 0) = 25000000Hz (slot req 25000000Hz, actual 25000000HZ div = 0)
[ 2016.717342] mmc1: new SD card at address aaaa
[ 2016.724507] ueventd: LoadWithAliases was unable to load mmc:block
[ 2016.743637] mmcblk1: mmc1:aaaa SU02G 1.84 GiB 
[ 2016.759133] mmcblk1: p1
[ 2016.782494] ueventd: LoadWithAliases was unable to load mmc:block

hikey960:/ # lsmod

Module                  Size  Used by
mmc_block              61440  0

I can mount /dev/block/mmcblk1p1 manually.
But I cant find /dev/mmc1.
Is it OK or NG?
How can I fix this ueventd’s message?

#2

I added some configs to common/arch/arm64/configs/hikey960_gki.fragment

CONFIG_HAS_IOMEM=m
CONFIG_MMC=m
CONFIG_MMC_SDHCI=m
CONFIG_MMC_SDHCI_PLTFM=m

hikey960:/ $ lsmod |grep mmc

mmc_block 61440 0
dw_mmc_k3 20480 0
dw_mmc_pltfm 20480 1 dw_mmc_k3
dw_mmc 69632 2 dw_mmc_k3,dw_mmc_pltfm
mmc_core 196608 4 wlcore_sdio,mmc_block,dw_mmc_k3,dw_mmc

But error message of ueventd has not changed.