Comment # 7 on bug 998440 from Giacomo Comes

In the test I have done, your chicken-egg problem does not seem to exist.
This is on the Acer Aspire.
I removed the cherryview module-setup.sh from
/usr/lib/dracut/modules/90cherryview
and rebuild the initrd. I checked that pinctrl-cherriview.ko is missing in the
initrd. 
I rebooted the laptop. Now the sd card reader is not working. lsmod shows:

pinctrl_cherryview     36864  2 
sdhci_acpi             16384  0 
sdhci                  40960  1 sdhci_acpi
mmc_block              36864  0 
mmc_core              151552  3 mmc_block,sdhci,sdhci_acpi

and the directory /sys/bus/mmc/drivers/mmcblk does exist.

I then put back module-setup.sh in /usr/lib/dracut/modules/90cherryview.
This file contains my modification that checks for the existence of 
  /sys/bus/mmc/drivers/mmcblk
I run dracut -f. pinctrl-cherriview.ko is insterted in the initrd. After reboot
the sd card reader works. lsmod shows:

pinctrl_cherryview     36864  5 
sdhci_acpi             16384  0 
sdhci                  40960  1 sdhci_acpi
mmc_block              36864  0 
mmc_core              151552  3 mmc_block,sdhci,sdhci_acpi