powerpc: Use pr_warn instead of pr_warning

At some point, pr_warning will be removed so all logging messages use
a consistent <prefix>_warn style.

Update arch/powerpc/

Miscellanea:

o Coalesce formats
o Realign arguments
o Use %s, __func__ instead of embedded function names
o Remove unnecessary line continuations

Signed-off-by: Joe Perches <joe@perches.com>
Acked-by: Geoff Levand <geoff@infradead.org>
[mpe: Rebase due to some %pOF changes.]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
diff --git a/arch/powerpc/platforms/ps3/os-area.c b/arch/powerpc/platforms/ps3/os-area.c
index 3db53e8..cdbfc5c 100644
--- a/arch/powerpc/platforms/ps3/os-area.c
+++ b/arch/powerpc/platforms/ps3/os-area.c
@@ -699,7 +699,7 @@ static void os_area_queue_work_handler(struct work_struct *work)
 
 	error = update_flash_db();
 	if (error)
-		pr_warning("%s: Could not update FLASH ROM\n", __func__);
+		pr_warn("%s: Could not update FLASH ROM\n", __func__);
 
 	pr_debug(" <- %s:%d\n", __func__, __LINE__);
 }