scsi: be2iscsi: Fix some missing space in some messages

Fix a few style issues reported by checkpatch.pl:

 - Avoid duplicated word in comment.

 - Add missing space in messages.

 - Unneeded continuation line character.

 - Unneeded extra spaces.

 - Unneeded log message after memory allocation failure.

Link: https://lore.kernel.org/r/8cb62f0eb96ec7ce7a73fe97cb4490dd5121ecff.1623482155.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>