mtd: inftlcore: Add error check for inftl_read_oob()
In the Linux kernel, the following vulnerability has been resolved:

mtd: inftlcore: Add error check for inftl_read_oob()

In INFTL_findwriteunit(), the return value of inftl_read_oob()
need to be checked. A proper implementation can be
found in INFTL_deleteblock(). The status will be set as
SECTOR_IGNORE to break from the while-loop correctly
if the inftl_read_oob() fails.