powerpc/mm: Use hpt_va to compute virtual address

Don't open code the same

Reviewed-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
diff --git a/arch/powerpc/platforms/cell/beat_htab.c b/arch/powerpc/platforms/cell/beat_htab.c
index 943c9d3..b83077e 100644
--- a/arch/powerpc/platforms/cell/beat_htab.c
+++ b/arch/powerpc/platforms/cell/beat_htab.c
@@ -259,7 +259,7 @@
 	u64 dummy0, dummy1;
 
 	vsid = get_kernel_vsid(ea, MMU_SEGSIZE_256M);
-	va = (vsid << 28) | (ea & 0x0fffffff);
+	va = hpt_va(ea, vsid, MMU_SEGSIZE_256M);
 
 	raw_spin_lock(&beat_htab_lock);
 	slot = beat_lpar_hpte_find(va, psize);