drm: Remove unused variable in drm_prime_sg_to_page_addr_arrays()

	unsigned count;

	struct scatterlist *sg;

	struct page *page;

	u32 len, offset;

	u32 len;

	int pg_index;

	dma_addr_t addr;

	pg_index = 0;

	for_each_sg(sgt->sgl, sg, sgt->nents, count) {

		len = sg->length;

		offset = sg->offset;

		page = sg_page(sg);

		addr = sg_dma_address(sg);