arch/m68k/include/asm/motorola_pgalloc.h: fix kunmap arg

arch/m68k/include/asm/motorola_pgalloc.h: In function 'pte_alloc_one':
arch/m68k/include/asm/motorola_pgalloc.h:44: warning: passing argument 1 of 'kunmap' from incompatible pointer type

Also, remove unneeded test for kmap() failure.
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NGeert Uytterhoeven <geert@linux-m68k.org>

arch/m68k/include/asm/motorola_pgalloc.h

@@ -36,12 +36,10 @@ static inline pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long addres
 		return NULL;
 
 	pte = kmap(page);
-	if (pte) {
 	__flush_page_to_ram(pte);
 	flush_tlb_kernel_page(pte);
 	nocache_page(pte);
-	}
-	kunmap(pte);
+	kunmap(page);
 	pgtable_page_ctor(page);
 	return page;
 }