treewide: cleanup continuations and remove logging message whitespace

Using C line continuation inside format strings is error prone.
Clean up the unintended whitespace introduced by misuse of \.
Neaten correctly used line continations as well for consistency.

drivers/scsi/arcmsr/arcmsr_hba.c has these errors as well,
but arcmsr needs a lot more work and the driver should likely be
moved to staging instead.

Signed-off-by: Joe Perches <joe@perches.com>
Acked-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/drivers/misc/spear13xx_pcie_gadget.c b/drivers/misc/spear13xx_pcie_gadget.c
index ec3b8c9..7aded90 100644
--- a/drivers/misc/spear13xx_pcie_gadget.c
+++ b/drivers/misc/spear13xx_pcie_gadget.c
@@ -787,8 +787,8 @@
 
 	status = request_irq(irq, spear_pcie_gadget_irq, 0, pdev->name, NULL);
 	if (status) {
-		dev_err(&pdev->dev, "pcie gadget interrupt IRQ%d already \
-				claimed\n", irq);
+		dev_err(&pdev->dev,
+			"pcie gadget interrupt IRQ%d already claimed\n", irq);
 		goto err_iounmap;
 	}