UBIFS: add ubifs_err() to print error reason
UBIFS: add ubifs_err() to print error reason

This patch adds ubifs_err() output to some error paths to tell the user
what's going on.

Artem: improve the messages, rename too long variable

Signed-off-by: Subodh Nijsure <41f86e562cc4270f815c4971ab286dca8e869f6a@grid-net.com>
Signed-off-by: Marc Kleine-Budde <4a0ea1158d3cc63151119c05b1bff00c0bdbf421@pengutronix.de>
Signed-off-by: Ben Shelton <873d2944fc7a954ed322314738197137e10de387@ni.com>
Acked-by: Brad Mouring <58d99a887450796456131638ba4c43b5ba95afcf@ni.com>
Acked-by: Terry Wilcox <5b87f063f5f64e9f7086775114efb0af8c097b78@ni.com>
Acked-by: Gratian Crisan <17cf39b7426cfdea7dd491f7105a23841aaa302f@ni.com>
Signed-off-by: Artem Bityutskiy <2f96f8cd3e2780a209d0ab27d1b44624d0019d3f@linux.intel.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs