ShellPkg/UefiShellBcfg: Exit early if ShellCommandLineParse() failed

Jump to the Done cleanup label when `ShellCommandLineParse()` fails, and move
the success path (unchanged) out of the now-unnecessary else block. This patch
does not introduce behavioral change.

Generated by the following Coccinelle semantic patch:

```smpl
@@
identifier status, problem, ret, hii;
statement S;
@@
  if (EFI_ERROR (status)) {
    if ((status == EFI_VOLUME_CORRUPTED) && (problem != NULL)) {
      ShellPrintHiiDefaultEx (STRING_TOKEN (STR_GEN_PROBLEM), hii, ..., problem);
      FreePool (problem);
      ret = SHELL_INVALID_PARAMETER;
    } else {
      ASSERT (FALSE);
    }
+   goto Done;
  }
- else {
    ...
- }
  ...
Done:
  S
```

Signed-off-by: Mingjie Shen <shen497@purdue.edu>

0 files changed, 0 insertions, 0 deletions