gas: no md_cons_align() for .nop{,s}

.nop and .nops generate code, not data. Hence them invoking
md_cons_align() is at best inappropriate. In fact it actually gets in
the of x86'es state maintenance involving i386_cons_align().

gas/read.c

@@ -3466,10 +3466,6 @@ s_nop (int ignore ATTRIBUTE_UNUSED)
   md_flush_pending_output ();
 #endif
 
-#ifdef md_cons_align
-  md_cons_align (1);
-#endif
-
   SKIP_WHITESPACE ();
   expression (&exp);
   demand_empty_rest_of_line ();
@@ -3519,10 +3515,6 @@ s_nops (int ignore ATTRIBUTE_UNUSED)
   md_flush_pending_output ();
 #endif
 
-#ifdef md_cons_align
-  md_cons_align (1);
-#endif
-
   SKIP_WHITESPACE ();
   expression (&exp);
   /* Note - this expression is tested for an absolute value in

gas/testsuite/gas/i386/align-branch-6.e

@@ -1,2 +1,2 @@
 .*: Assembler messages:
-.*:4: Warning: `constant directive` skips -malign-branch-boundary on `jnc`
+.*:5: Warning: `constant directive` skips -malign-branch-boundary on `jnc`

gas/testsuite/gas/i386/lfence-byte.d

@@ -27,4 +27,13 @@ Disassembly of section .text:
  +[a-f0-9]+:	f3 c3                	repz ret
  +[a-f0-9]+:	c3                   	ret
  +[a-f0-9]+:	f3 ff d0             	repz call \*%eax
+
+[a-f0-9]+ <directive>:
+ +[a-f0-9]+:	90                   	nop
+ +[a-f0-9]+:	0f ae e8             	lfence
+ +[a-f0-9]+:	ff d0                	call   \*%eax
+ +[a-f0-9]+:	8d 76 00             	lea    (0x)?0\(%esi\),%esi
+ +[a-f0-9]+:	83 0c 24 00          	orl    \$0x0,\(%esp\)
+ +[a-f0-9]+:	0f ae e8             	lfence
+ +[a-f0-9]+:	c3                   	ret
 #pass

gas/testsuite/gas/i386/lfence-byte.s

@@ -21,3 +21,10 @@ _start:
 	call *%eax
 	.data
 	.byte 0
+
+	.text
+directive:
+	.nop
+	call	*%eax
+	.nops 3
+	ret