This pull request contains updates for JFFS2, UBI and UBIFS

JFFS2:
	- Fix memory corruption in error path
	- Spelling and coding style fixes

UBI:
	- Switch to BLK_MQ_F_BLOCKING in ubiblock
	- Wire up partent device (for sysfs)
	- Multiple UAF bugfixes
	- Fix for an infinite loop in WL error path

UBIFS:
	- Fix for multiple memory leaks in error paths
	- Fixes for wrong space accounting
	- Minor cleanups
	- Spelling and coding style fixes
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