sfc: Delete redundant page_addr variable from efx_init_rx_buffers_page()

	struct efx_nic *efx = rx_queue->efx;

	struct efx_rx_buffer *rx_buf;

	struct page *page;

	void *page_addr;

	struct efx_rx_page_state *state;

	dma_addr_t dma_addr;

	unsigned index, count;

			__free_pages(page, efx->rx_buffer_order);

			return -EIO;

		}

		page_addr = page_address(page);

		state = page_addr;

		state = page_address(page);

		state->refcnt = 0;

		state->dma_addr = dma_addr;

		page_addr += sizeof(struct efx_rx_page_state);

		dma_addr += sizeof(struct efx_rx_page_state);

	split:

			/* Use the second half of the page */

			get_page(page);

			dma_addr += (PAGE_SIZE >> 1);

			page_addr += (PAGE_SIZE >> 1);

			++count;

			goto split;

		}