fs: Build sys_stat64() and friends if __ARCH_WANT_COMPAT_STAT64

On AArch64 Linux, we want the sys_stat64() and related functions for
compat support but do not need the generic struct stat64, enabled
automatically if __ARCH_WANT_STAT64.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
diff --git a/fs/stat.c b/fs/stat.c
index b6ff118..6126c5d 100644
--- a/fs/stat.c
+++ b/fs/stat.c
@@ -326,7 +326,7 @@
 
 
 /* ---------- LFS-64 ----------- */
-#ifdef __ARCH_WANT_STAT64
+#if defined(__ARCH_WANT_STAT64) || defined(__ARCH_WANT_COMPAT_STAT64)
 
 #ifndef INIT_STRUCT_STAT64_PADDING
 #  define INIT_STRUCT_STAT64_PADDING(st) memset(&st, 0, sizeof(st))
@@ -415,7 +415,7 @@
 		return error;
 	return cp_new_stat64(&stat, statbuf);
 }
-#endif /* __ARCH_WANT_STAT64 */
+#endif /* __ARCH_WANT_STAT64 || __ARCH_WANT_COMPAT_STAT64 */
 
 /* Caller is here responsible for sufficient locking (ie. inode->i_lock) */
 void __inode_add_bytes(struct inode *inode, loff_t bytes)