mm/thp: remove redundant CONFIG_TRANSPARENT_HUGEPAGE

Simplify code by removing redundant CONFIG_TRANSPARENT_HUGEPAGE judgment.

No functional change.

Link: https://lkml.kernel.org/r/20220829095125.3284567-1-liushixin2@huawei.comSigned-off-by: NLiu Shixin <liushixin2@huawei.com>
Cc: Kefeng Wang <wangkefeng.wang@huawei.com>
Cc: Matthew Wilcox <willy@infradead.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>

include/linux/pgtable.h

@@ -1276,8 +1276,7 @@ static inline int pgd_devmap(pgd_t pgd)
 #endif
 
 #if !defined(CONFIG_TRANSPARENT_HUGEPAGE) || \
-	(defined(CONFIG_TRANSPARENT_HUGEPAGE) && \
-	 !defined(CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD))
+	!defined(CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD)
 static inline int pud_trans_huge(pud_t pud)
 {
 	return 0;