Revert "[MCAsmParser] .rept/.irp/.irpc: remove excess tail EOL in expansion"

This reverts commit c6e787f.

parseEOL() would remove \n # after .endr, not recognizing the line marker.

```
// reduced from Linux kernel arch/x86/crypto/sha1_avx2_x86_64_asm.S
.rept 1
nop
.endr
# 512 "a.s"
```

Author: MaskRay

llvm/lib/MC/MCParser/AsmParser.cpp

@@ -5624,20 +5624,27 @@ MCAsmMacro *AsmParser::parseMacroLikeBody(SMLoc DirectiveLoc) {
       return nullptr;
     }
 
-    if (Lexer.is(AsmToken::Identifier)) {
-      StringRef Ident = getTok().getIdentifier();
-      if (Ident == ".rep" || Ident == ".rept" || Ident == ".irp" ||
-          Ident == ".irpc") {
-        ++NestLevel;
-      } else if (Ident == ".endr") {
-        if (NestLevel == 0) {
-          EndToken = getTok();
-          Lex();
-          if (!parseEOL())
-            break;
+    if (Lexer.is(AsmToken::Identifier) &&
+        (getTok().getIdentifier() == ".rep" ||
+         getTok().getIdentifier() == ".rept" ||
+         getTok().getIdentifier() == ".irp" ||
+         getTok().getIdentifier() == ".irpc")) {
+      ++NestLevel;
+    }
+
+    // Otherwise, check whether we have reached the .endr.
+    if (Lexer.is(AsmToken::Identifier) && getTok().getIdentifier() == ".endr") {
+      if (NestLevel == 0) {
+        EndToken = getTok();
+        Lex();
+        if (Lexer.isNot(AsmToken::EndOfStatement)) {
+          printError(getTok().getLoc(),
+                     "unexpected token in '.endr' directive");
+          return nullptr;
         }
-        --NestLevel;
+        break;
       }
+      --NestLevel;
     }
 
     // Otherwise, scan till the end of the statement.

llvm/test/MC/AsmParser/macro-rept.s

@@ -13,10 +13,10 @@
 // CHECK: .long	1
 // CHECK: .long	1
 
-// CHECK:      .long	0
-// CHECK-NEXT: .long	0
-// CHECK-NEXT: .long	0
-// CHECK-NEXT: .long	0
-// CHECK-NEXT: .long	0
-// CHECK-NEXT: .long	0
-// CHECK-EMPTY:
+// CHECK: .long	0
+// CHECK: .long	0
+// CHECK: .long	0
+
+// CHECK: .long	0
+// CHECK: .long	0
+// CHECK: .long	0