patman: Update documentation to match new usage

With the subcommands some of the documentation examples are no-longer
correct. Fix all of them, so it is consistent.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/tools/patman/README b/tools/patman/README
index 6b80663..53f55ce 100644
--- a/tools/patman/README
+++ b/tools/patman/README
@@ -136,17 +136,17 @@
 
 First do a dry run:
 
-$ ./tools/patman/patman -n
+$ ./tools/patman/patman send -n
 
 If it can't detect the upstream branch, try telling it how many patches
 there are in your series:
 
-$ ./tools/patman/patman -n -c5
+$ ./tools/patman/patman -c5 send -n
 
 This will create patch files in your current directory and tell you who
 it is thinking of sending them to. Take a look at the patch files.
 
-$ ./tools/patman/patman -n -c5 -s1
+$ ./tools/patman/patman -c5 -s1 send -n
 
 Similar to the above, but skip the first commit and take the next 5. This
 is useful if your top commit is for setting up testing.
@@ -433,12 +433,12 @@
 on the list. So you can tell patman to create and check some patches
 (skipping the first patch) with:
 
-    patman -s1 -n
+    patman -s1 send -n
 
 If you want to do all of them including the work-in-progress one, then
 (if you are tracking an upstream branch):
 
-    patman -n
+    patman send -n
 
 Let's say that patman reports an error in the second patch. Then:
 
@@ -450,7 +450,7 @@
 
 Now you have an updated patch series. To check it:
 
-    patman -s1 -n
+    patman -s1 send -n
 
 Let's say it is now clean and you want to send it. Now you need to set up
 the destination. So amend the top commit with:
@@ -485,7 +485,7 @@
 
 Now to send the patches, take off the -n flag:
 
-   patman -s1
+   patman -s1 send
 
 The patches will be created, shown in your editor, and then sent along with
 the cover letter. Note that patman's tags are automatically removed so that