s390/mm: fix invalid __pa() usage in pfn_pXd() macros

There is little sense in applying __pa() to a physical
address, but that what pfn_pXd() macros do.
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>

arch/s390/include/asm/pgtable.h

@@ -1329,7 +1329,7 @@ static inline bool gup_fast_permitted(unsigned long start, unsigned long end)
 }
 #define gup_fast_permitted gup_fast_permitted
 
-#define pfn_pte(pfn,pgprot) mk_pte_phys(__pa((pfn) << PAGE_SHIFT),(pgprot))
+#define pfn_pte(pfn, pgprot)	mk_pte_phys(((pfn) << PAGE_SHIFT), (pgprot))
 #define pte_pfn(x) (pte_val(x) >> PAGE_SHIFT)
 #define pte_page(x) pfn_to_page(pte_pfn(x))
 
@@ -1636,7 +1636,7 @@ static inline pmd_t pmdp_collapse_flush(struct vm_area_struct *vma,
 }
 #define pmdp_collapse_flush pmdp_collapse_flush
 
-#define pfn_pmd(pfn, pgprot)	mk_pmd_phys(__pa((pfn) << PAGE_SHIFT), (pgprot))
+#define pfn_pmd(pfn, pgprot)	mk_pmd_phys(((pfn) << PAGE_SHIFT), (pgprot))
 #define mk_pmd(page, pgprot)	pfn_pmd(page_to_pfn(page), (pgprot))
 
 static inline int pmd_trans_huge(pmd_t pmd)