btrfs: remove colon from messages with state

The message format in syslog is usually made of two parts:

  prefix ":" message

Various tools parse the prefix up to the first ":". When there's
an additional status of a btrfs filesystem like

  [5.199782] BTRFS info (device nvme1n1p1: state M): use zstd compression, level 9

where 'M' is for remount, there's one more ":" that does not conform to
the format. Remove it.
Reviewed-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/messages.c

@@ -7,7 +7,7 @@
 
 #ifdef CONFIG_PRINTK
 
-#define STATE_STRING_PREFACE	": state "
+#define STATE_STRING_PREFACE	" state "
 #define STATE_STRING_BUF_LEN	(sizeof(STATE_STRING_PREFACE) + BTRFS_FS_STATE_COUNT + 1)
 
 /*