media: atomisp: totalram_pages is now a function

Fix the usage of totalram_pages, as this is now a function.

Fixes: ca79b0c2 ("mm: convert totalram_pages and totalhigh_pages variables to atomic")
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/staging/media/atomisp/pci/atomisp2/mmu/isp_mmu.c

@@ -102,7 +102,7 @@ static phys_addr_t alloc_page_table(struct isp_mmu *mmu)
 	 * The slab allocator(kmem_cache and kmalloc family) doesn't handle
 	 * GFP_DMA32 flag, so we have to use buddy allocator.
 	 */
-	if (totalram_pages > (unsigned long)NR_PAGES_2GB)
+	if (totalram_pages() > (unsigned long)NR_PAGES_2GB)
 		virt = (void *)__get_free_page(GFP_KERNEL | GFP_DMA32);
 	else
 		virt = kmem_cache_zalloc(mmu->tbl_cache, GFP_KERNEL);