MIPS: Remove unused variable 'lastpfn'

'lastpfn' is never used for anything. Remove it.
Signed-off-by: Steven J. Hill <steven.hill@cavium.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/17276/Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/mm/init.c

@@ -402,7 +402,6 @@ int page_is_ram(unsigned long pagenr)
 void __init paging_init(void)
 {
 	unsigned long max_zone_pfns[MAX_NR_ZONES];
-	unsigned long lastpfn __maybe_unused;
 
 	pagetable_init();
 
@@ -416,17 +415,14 @@ void __init paging_init(void)
 	max_zone_pfns[ZONE_DMA32] = MAX_DMA32_PFN;
 #endif
 	max_zone_pfns[ZONE_NORMAL] = max_low_pfn;
-	lastpfn = max_low_pfn;
 #ifdef CONFIG_HIGHMEM
 	max_zone_pfns[ZONE_HIGHMEM] = highend_pfn;
-	lastpfn = highend_pfn;
 
 	if (cpu_has_dc_aliases && max_low_pfn != highend_pfn) {
 		printk(KERN_WARNING "This processor doesn't support highmem."
 		       " %ldk highmem ignored\n",
 		       (highend_pfn - max_low_pfn) << (PAGE_SHIFT - 10));
 		max_zone_pfns[ZONE_HIGHMEM] = max_low_pfn;
-		lastpfn = max_low_pfn;
 	}
 #endif