parisc: Fix encoding of swp_entry due to added SWP_EXCLUSIVE flag

Fix the __swp_offset() and __swp_entry() macros due to commit 6d239fc78c0b
("parisc/mm: support __HAVE_ARCH_PTE_SWP_EXCLUSIVE") which introduced the
SWP_EXCLUSIVE flag by reusing the _PAGE_ACCESSED flag.

Reported-by: Christoph Biedl <[e-mail]>
Tested-by: Christoph Biedl <[e-mail]>
Reviewed-by: David Hildenbrand <[e-mail]>
Signed-off-by: Helge Deller <[e-mail]>
Fixes: 6d239fc78c0b ("parisc/mm: support __HAVE_ARCH_PTE_SWP_EXCLUSIVE")
Cc: <[e-mail]> # v6.3+

arch/parisc/include/asm/pgtable.h

···
  *   For the 64bit version, the offset is extended by 32bit.
  */
 #define __swp_type(x)                     ((x).val & 0x1f)
-#define __swp_offset(x)                   ( (((x).val >> 6) &  0x7) | \
-					  (((x).val >> 8) & ~0x7) )
+#define __swp_offset(x)                   ( (((x).val >> 5) & 0x7) | \
+					  (((x).val >> 10) << 3) )
 #define __swp_entry(type, offset)         ((swp_entry_t) { \
 					    ((type) & 0x1f) | \
-					    ((offset &  0x7) << 6) | \
-					    ((offset & ~0x7) << 8) })
+					    ((offset & 0x7) << 5) | \
+					    ((offset >> 3) << 10) })
 #define __pte_to_swp_entry(pte)		((swp_entry_t) { pte_val(pte) })
 #define __swp_entry_to_pte(x)		((pte_t) { (x).val })