binman: Fix up the entry-docs for Entry_pre_load

This has got out of sync and needs a line wrap. Fix it.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/tools/binman/entries.rst b/tools/binman/entries.rst
index 782bff1..283751e 100644
--- a/tools/binman/entries.rst
+++ b/tools/binman/entries.rst
@@ -1231,7 +1231,8 @@
 --------------------------------------
 
 Properties / Entry arguments:
-    - pre-load-key-path: Path of the directory that store key (provided by the environment variable PRE_LOAD_KEY_PATH)
+    - pre-load-key-path: Path of the directory that store key (provided by
+      the environment variable PRE_LOAD_KEY_PATH)
     - content: List of phandles to entries to sign
     - algo-name: Hash and signature algo to use for the signature
     - padding-name: Name of the padding (pkcs-1.5 or pss)
diff --git a/tools/binman/etype/pre_load.py b/tools/binman/etype/pre_load.py
index 245ee75..b622281 100644
--- a/tools/binman/etype/pre_load.py
+++ b/tools/binman/etype/pre_load.py
@@ -37,7 +37,8 @@
     """Pre load image header
 
     Properties / Entry arguments:
-        - pre-load-key-path: Path of the directory that store key (provided by the environment variable PRE_LOAD_KEY_PATH)
+        - pre-load-key-path: Path of the directory that store key (provided by
+          the environment variable PRE_LOAD_KEY_PATH)
         - content: List of phandles to entries to sign
         - algo-name: Hash and signature algo to use for the signature
         - padding-name: Name of the padding (pkcs-1.5 or pss)