s390/pci: use proper endianness annotations

Add proper annotation to the bar definition and use casts within the
bus accessors. Also change the sequence in the accessors to do the
shifts in the native byte order. No functional change.

Signed-off-by: Sebastian Ott <[e-mail]>
Signed-off-by: Martin Schwidefsky <[e-mail]>

arch/s390/include/asm/pci_clp.h

···
 	u32 fid;			/* pci function id */
 	u8 bar_size[PCI_BAR_COUNT];
 	u16 pchid;
-	u32 bar[PCI_BAR_COUNT];
+	__le32 bar[PCI_BAR_COUNT];
 	u8 pfip[CLP_PFIP_NR_SEGMENTS];	/* pci function internal path */
 	u32			: 16;
 	u8 fmb_len;

arch/s390/pci/pci.c

···
 
 	rc = zpci_load(&data, req, offset);
 	if (!rc) {
-		data = data << ((8 - len) * 8);
-		data = le64_to_cpu(data);
+		data = le64_to_cpu((__force __le64) data);
+		data >>= (8 - len) * 8;
 		*val = (u32) data;
 	} else
 		*val = 0xffffffff;
···
 	u64 data = val;
 	int rc;
 
-	data = cpu_to_le64(data);
-	data = data >> ((8 - len) * 8);
+	data <<= (8 - len) * 8;
+	data = (__force u64) cpu_to_le64(data);
 	rc = zpci_store(data, req, offset);
 	return rc;
 }