wireless: Remove unnecessary alloc/OOM messages, alloc cleanups

alloc failures already get standardized OOM
messages and a dump_stack.

Convert kzalloc's with multiplies to kcalloc.
Convert kmalloc's with multiplies to kmalloc_array.
Remove now unused variables.
Remove unnecessary memset after kzalloc->kcalloc.
Whitespace cleanups for these changes.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/wireless/mwifiex/sdio.c b/drivers/net/wireless/mwifiex/sdio.c
index 5a1c1d0..31d7b2b 100644
--- a/drivers/net/wireless/mwifiex/sdio.c
+++ b/drivers/net/wireless/mwifiex/sdio.c
@@ -718,11 +718,8 @@
 
 	/* Assume that the allocated buffer is 8-byte aligned */
 	fwbuf = kzalloc(MWIFIEX_UPLD_SIZE, GFP_KERNEL);
-	if (!fwbuf) {
-		dev_err(adapter->dev,
-			"unable to alloc buffer for FW. Terminating dnld\n");
+	if (!fwbuf)
 		return -ENOMEM;
-	}
 
 	/* Perform firmware data transfer */
 	do {
@@ -1520,7 +1517,6 @@
 
 	card->mpa_tx.buf = kzalloc(mpa_tx_buf_size, GFP_KERNEL);
 	if (!card->mpa_tx.buf) {
-		dev_err(adapter->dev, "could not alloc buffer for MP-A TX\n");
 		ret = -1;
 		goto error;
 	}
@@ -1529,7 +1525,6 @@
 
 	card->mpa_rx.buf = kzalloc(mpa_rx_buf_size, GFP_KERNEL);
 	if (!card->mpa_rx.buf) {
-		dev_err(adapter->dev, "could not alloc buffer for MP-A RX\n");
 		ret = -1;
 		goto error;
 	}
@@ -1682,10 +1677,8 @@
 
 	/* Allocate buffers for SDIO MP-A */
 	card->mp_regs = kzalloc(MAX_MP_REGS, GFP_KERNEL);
-	if (!card->mp_regs) {
-		dev_err(adapter->dev, "failed to alloc mp_regs\n");
+	if (!card->mp_regs)
 		return -ENOMEM;
-	}
 
 	ret = mwifiex_alloc_sdio_mpa_buffers(adapter,
 					     SDIO_MP_TX_AGGR_DEF_BUF_SIZE,