x86: cmd: hob: Fix the command usage and help messages

At present the hob command usage and help messages are messed up
in a single line. They should be separated.

This was a regression introduced when [seq] and [-v] were added
to the command.

Fixes: d11544dfa9f4 ("x86: hob: Add way to show a single hob entry")
Fixes: 51af144eb7a0 ("x86: Allow showing details about a HOB entry")
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Tested on chromebook_coral, chromebook_samus, chromebook_link, minnowmax
Tested-by: Simon Glass <sjg@chromium.org>
diff --git a/cmd/x86/hob.c b/cmd/x86/hob.c
index 01db93e..71e7fcb 100644
--- a/cmd/x86/hob.c
+++ b/cmd/x86/hob.c
@@ -158,8 +158,7 @@
 }
 
 U_BOOT_CMD(hob, 3, 1, do_hob,
-	   "[-v] [seq]  Print Hand-Off Block (HOB) information"
-	   "   -v  - Show detailed HOB information where available"
-	   "   seq - Record # to show (all by default)",
-	   ""
+	   "[-v] [seq]  Print Hand-Off Block (HOB) information",
+	   "   -v  - Show detailed HOB information where available\n"
+	   "   seq - Record # to show (all by default)"
 );