x86: fix compile error in current tip.git

Gas 2.15 complains about 32-bit registers being used in lea.

  AS      arch/x86/lib/copy_user_64.o
/local/scratch-2/jeremy/hg/xen/paravirt/linux/arch/x86/lib/copy_user_64.S: Assembler messages:
/local/scratch-2/jeremy/hg/xen/paravirt/linux/arch/x86/lib/copy_user_64.S:188: Error: `(%edx,%ecx,8)' is not a valid 64 bit base/index expression
/local/scratch-2/jeremy/hg/xen/paravirt/linux/arch/x86/lib/copy_user_64.S:257: Error: `(%edx,%ecx,8)' is not a valid 64 bit base/index expression
  AS      arch/x86/lib/copy_user_nocache_64.o
/local/scratch-2/jeremy/hg/xen/paravirt/linux/arch/x86/lib/copy_user_nocache_64.S: Assembler messages:
/local/scratch-2/jeremy/hg/xen/paravirt/linux/arch/x86/lib/copy_user_nocache_64.S:107: Error: `(%edx,%ecx,8)' is not a valid 64 bit base/index expression
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Vitaly Mayatskikh <v.mayatskih@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

arch/x86/lib/copy_user_64.S

@@ -185,7 +185,7 @@ ENTRY(copy_user_generic_unrolled)
 30:	shll $6,%ecx
 	addl %ecx,%edx
 	jmp 60f
-40:	leal (%edx,%ecx,8),%edx
+40:	lea (%rdx,%rcx,8),%rdx
 	jmp 60f
 50:	movl %ecx,%edx
 60:	jmp copy_user_handle_tail /* ecx is zerorest also */
@@ -254,7 +254,7 @@ ENTRY(copy_user_generic_string)
 	ret
 
 	.section .fixup,"ax"
-11:	leal (%edx,%ecx,8),%ecx
+11:	lea (%rdx,%rcx,8),%rcx
 12:	movl %ecx,%edx		/* ecx is zerorest also */
 	jmp copy_user_handle_tail
 	.previous

arch/x86/lib/copy_user_nocache_64.S

@@ -104,7 +104,7 @@ ENTRY(__copy_user_nocache)
 30:	shll $6,%ecx
 	addl %ecx,%edx
 	jmp 60f
-40:	leal (%edx,%ecx,8),%edx
+40:	lea (%rdx,%rcx,8),%rdx
 	jmp 60f
 50:	movl %ecx,%edx
 60:	sfence