Merge branch 'linux-next' of git://git.infradead.org/ubi-2.6
* 'linux-next' of git://git.infradead.org/ubi-2.6:
UBI: do not warn unnecessarily
UBI: do not print message about corruptes PEBs if we have none of them
UBI: improve delete-compatible volumes handling
UBI: fix error message and compilation warnings
UBI: generate random image_seq when formatting MTD devices
UBI: improve ECC error message
UBI: improve corrupted flash handling
UBI: introduce eraseblock counter variables
UBI: introduce a new IO return code
UBI: simplify IO error codes
