Update x86/APX: VROUND{P,S}{S,D} can generally be encoded

Append "#pass" to APX tests for targets which pad text sections with NOPs.

	* testsuite/gas/i386/x86-64-apx-evex-promoted-intel.d: Append
	"#pass".
	* testsuite/gas/i386/x86-64-apx-evex-promoted.d: Likewise.

gas/testsuite/gas/i386/x86-64-apx-evex-promoted-intel.d

@@ -320,3 +320,4 @@ Disassembly of section \.text:
 [	 ]*[a-f0-9]+:[	 ]*62 4c fc 08 66 bc 87 23 01 00 00[	 ]+wrssq[	 ]+\[r31\+rax\*4\+0x123\],r31
 [	 ]*[a-f0-9]+:[	 ]*62 4c 7d 08 65 8c 87 23 01 00 00[	 ]+wrussd[	 ]+\[r31\+rax\*4\+0x123\],r25d
 [	 ]*[a-f0-9]+:[	 ]*62 4c fd 08 65 bc 87 23 01 00 00[	 ]+wrussq[	 ]+\[r31\+rax\*4\+0x123\],r31
+#pass

gas/testsuite/gas/i386/x86-64-apx-evex-promoted.d

@@ -320,3 +320,4 @@ Disassembly of section \.text:
 [	 ]*[a-f0-9]+:[	 ]*62 4c fc 08 66 bc 87 23 01 00 00[	 ]+wrssq[	 ]+%r31,0x123\(%r31,%rax,4\)
 [	 ]*[a-f0-9]+:[	 ]*62 4c 7d 08 65 8c 87 23 01 00 00[	 ]+wrussd[	 ]+%r25d,0x123\(%r31,%rax,4\)
 [	 ]*[a-f0-9]+:[	 ]*62 4c fd 08 65 bc 87 23 01 00 00[	 ]+wrussq[	 ]+%r31,0x123\(%r31,%rax,4\)
+#pass