powerpc/nohash: Fix build with llvm-as

When using the LLVM integrated assembler (llvm-as), the book3e build
fails with:

  arch/powerpc/mm/nohash/tlb_low_64e.S:354:2: error: invalid instruction
   tlbilxva 0,%r15
   ^

tlbilxva is an extended mnemonic for tlbilx, but llvm-as also doesn't
support tlbilx, despite it being an e500mc instruction.

Fix it by using the existing PPC_TLBILX_VA macro. The resulting binary
is identical when building with binutils.

Signed-off-by: Michael Ellerman <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

Author: mpe

arch/powerpc/mm/nohash/tlb_low_64e.S

@@ -351,7 +351,7 @@ END_FTR_SECTION_NESTED(CPU_FTR_EMB_HV,CPU_FTR_EMB_HV,532)
 
 	mfspr	r15,SPRN_MAS2
 	isync
-	tlbilxva 0,r15
+	PPC_TLBILX_VA(0,R15)
 	isync
 
 	mtspr	SPRN_MAS6,r10