drivers:net: Remove dma_alloc_coherent OOM messages

I believe these error messages are already logged
on allocation failure by warn_alloc_failed and so
get a dump_stack on OOM.

Remove the unnecessary additional error logging.

Around these deletions:

o Alignment neatening.
o Remove unnecessary casts of dma_alloc_coherent.
o Hoist assigns from ifs.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/irda/bfin_sir.c b/drivers/net/irda/bfin_sir.c
index fed4a05..a06fca6 100644
--- a/drivers/net/irda/bfin_sir.c
+++ b/drivers/net/irda/bfin_sir.c
@@ -389,7 +389,8 @@
 	set_dma_callback(port->rx_dma_channel, bfin_sir_dma_rx_int, dev);
 	set_dma_callback(port->tx_dma_channel, bfin_sir_dma_tx_int, dev);
 
-	port->rx_dma_buf.buf = (unsigned char *)dma_alloc_coherent(NULL, PAGE_SIZE, &dma_handle, GFP_DMA);
+	port->rx_dma_buf.buf = dma_alloc_coherent(NULL, PAGE_SIZE,
+						  &dma_handle, GFP_DMA);
 	port->rx_dma_buf.head = 0;
 	port->rx_dma_buf.tail = 0;
 	port->rx_dma_nrows = 0;