Fix kernel compilation when using the LLVM integrated assembly.

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Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

Pull arm64 fix from Catalin Marinas:
 "Fix kernel compilation when using the LLVM integrated assembly.

  A recent commit (2decad92f4, "arm64: mte: Ensure TIF_MTE_ASYNC_FAULT
  is set atomically") broke the kernel build when using the LLVM
  integrated assembly (only noticeable with clang-12 as MTE is not
  supported by earlier versions and the code in question not compiled).
  The Fixes: tag in the commit refers to the original patch introducing
  subsections for the alternative code sequences"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: alternatives: Move length validation in alternative_{insn, endif}

arch/arm64/include/asm/alternative-macros.h

@@ -97,9 +97,9 @@
 	.popsection
 	.subsection 1
 663:	\insn2
-664:	.previous
-	.org	. - (664b-663b) + (662b-661b)
+664:	.org	. - (664b-663b) + (662b-661b)
 	.org	. - (662b-661b) + (664b-663b)
+	.previous
 	.endif
 .endm
 
@@ -169,11 +169,11 @@
  */
 .macro alternative_endif
 664:
+	.org	. - (664b-663b) + (662b-661b)
+	.org	. - (662b-661b) + (664b-663b)
 	.if .Lasm_alt_mode==0
 	.previous
 	.endif
-	.org	. - (664b-663b) + (662b-661b)
-	.org	. - (662b-661b) + (664b-663b)
 .endm
 
 /*