x86/mm: Use min() instead of min_t() in the e820 printout code

The type of "MAX_DMA_PFN" and "xXx_pfn" are both unsigned long
now, so use min() instead of min_t().
Suggested-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NXishi Qiu <qiuxishi@huawei.com>
Cc: Linux MM <linux-mm@kvack.org>
Cc: <dave@sr71.net>
Cc: Rik van Riel <riel@redhat.com>
Link: http://lkml.kernel.org/r/5487AB3F.7050807@huawei.comSigned-off-by: NIngo Molnar <mingo@kernel.org>

arch/x86/kernel/e820.c

@@ -1114,8 +1114,8 @@ void __init memblock_find_dma_reserve(void)
 	 * at first, and assume boot_mem will not take below MAX_DMA_PFN
 	 */
 	for_each_mem_pfn_range(i, MAX_NUMNODES, &start_pfn, &end_pfn, NULL) {
-		start_pfn = min_t(unsigned long, start_pfn, MAX_DMA_PFN);
-		end_pfn = min_t(unsigned long, end_pfn, MAX_DMA_PFN);
+		start_pfn = min(start_pfn, MAX_DMA_PFN);
+		end_pfn = min(end_pfn, MAX_DMA_PFN);
 		nr_pages += end_pfn - start_pfn;
 	}