[XFS] fix valid but harmless sparse warning

The new xlog_recover_do_reg_buffer checks call be16_to_cpu on di_gen which
is a 32bit value so sparse rightly complains. Fortunately the warning is
harmless because we don't care for the value, but only whether it's
non-NULL. Due to that fact we can simply kill the endian swaps on this and
the previous di_mode check entirely.

SGI-PV: 969656
SGI-Modid: xfs-linux-melb:xfs-kern:29709a
Signed-off-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
Signed-off-by: Tim Shimmin <tes@sgi.com>

fs/xfs/xfs_log_recover.c

@@ -1920,9 +1920,9 @@ xlog_recover_do_reg_buffer(
 				stale_buf = 1;
 				break;
 			}
-			if (be16_to_cpu(dip->di_core.di_mode))
+			if (dip->di_core.di_mode)
 				mode_count++;
-			if (be16_to_cpu(dip->di_core.di_gen))
+			if (dip->di_core.di_gen)
 				gen_count++;
 		}