powerpc: mmu: Fix FSL_BOOKE_MAS2() macro

Effective page number mask for MAS2 register is stored in macro MAS2_EPN.

Fixes: 2146cf56821c ("Reworked FSL Book-E TLB macros to be more readable")
Signed-off-by: Pali Rohár <pali@kernel.org>
diff --git a/arch/powerpc/include/asm/mmu.h b/arch/powerpc/include/asm/mmu.h
index 2e6255f..b0aafdc 100644
--- a/arch/powerpc/include/asm/mmu.h
+++ b/arch/powerpc/include/asm/mmu.h
@@ -447,7 +447,7 @@
 		(((ts) << 12) & MAS1_TS)                |\
 		(MAS1_TSIZE(tsize)))
 #define FSL_BOOKE_MAS2(epn, wimge) \
-		(((epn) & MAS3_RPN) | (wimge))
+		(((epn) & MAS2_EPN) | (wimge))
 #define FSL_BOOKE_MAS3(rpn, user, perms) \
 		(((rpn) & MAS3_RPN) | (user) | (perms))
 #define FSL_BOOKE_MAS7(rpn) \