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: d11544df ("x86: hob: Add way to show a single hob entry")
Fixes: 51af144e ("x86: Allow showing details about a HOB entry")
Signed-off-by: NBin Meng <bmeng.cn@gmail.com>
Reviewed-by: NSimon Glass <sjg@chromium.org>
Tested on chromebook_coral, chromebook_samus, chromebook_link, minnowmax
Tested-by: NSimon Glass <sjg@chromium.org>

cmd/x86/hob.c

@@ -158,8 +158,7 @@ static int do_hob(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
 }
 
 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)"
 );