[FS#1203] Kernel panics reading and writing SD cards using mmc-mtk and kernel 4.9.x

[LEDE Bugs]

The following task has a new comment added:

FS#1203 - Kernel panics reading and writing SD cards using mmc-mtk and kernel 4.9.x
User who did this - Mathias Kresin (mkresin)

----------
Please test the latest snapshot. Some sd/mmc card related fixes were committed.
----------

More information can be found at the following URL:
https://bugs.openwrt.org/index.php?do=details&task_id=1203#comment4555