b43: allocate receive buffers big enough for max frame len + offset

Otherwise, skb_put inside of dma_rx can fail...

	https://bugzilla.kernel.org/show_bug.cgi?id=32042

Signed-off-by: John W. Linville <linville@tuxdriver.com>
Acked-by: Larry Finger <Larry.Finger@lwfinger.net>
Cc: stable@kernel.org
static void op32_poke_tx(struct b43_dmaring *ring, int slot)
{
	b43_dma_write(ring, B43_DMA32_TXINDEX,
		      (u32) (slot * sizeof(struct b43_dmadesc32)));
}

static void op32_poke_tx(struct b43_dmaring *ring, int slot)
{
	b43_dma_write(ring, B43_DMA32_TXINDEX,
		      (u32) (slot * sizeof(struct b43_dmadesc32)));
}
