pxe: Drop get_bootfile_path()

This function no longer makes sense, since it is pretty easy to prepend
the boot directory to the filename. Drop it and update its only caller.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Artem Lapkin <email2tema@gmail.com>
Tested-by: Artem Lapkin <email2tema@gmail.com>
Reviewed-by: Ramon Fried <rfried.dev@gmail.com>
diff --git a/include/pxe_utils.h b/include/pxe_utils.h
index 543d024..8b50f2e 100644
--- a/include/pxe_utils.h
+++ b/include/pxe_utils.h
@@ -202,7 +202,8 @@
  * @allow_abs_path: true to allow absolute paths
  * @bootfile: Bootfile whose directory loaded files are relative to, NULL if
  *	none
- * @return 0 if OK, -ENOMEM if out of memory
+ * @return 0 if OK, -ENOMEM if out of memory, -E2BIG if bootfile is larger than
+ *	MAX_TFTP_PATH_LEN bytes
  */
 int pxe_setup_ctx(struct pxe_context *ctx, struct cmd_tbl *cmdtp,
 		  pxe_getfile_func getfile, void *userdata,