net: dsa: rtl8365mb: fix garbled comment

Fixes: 4af2950 ("net: dsa: realtek-smi: add rtl8365mb subdriver for RTL8365MB-VC")
Signed-off-by: Alvin Šipraga <alsi@bang-olufsen.dk>
Signed-off-by: David S. Miller <davem@davemloft.net>

Author: sipraga

drivers/net/dsa/rtl8365mb.c

@@ -276,7 +276,7 @@
 		(RTL8365MB_PORT_ISOLATION_REG_BASE + (_physport))
 #define   RTL8365MB_PORT_ISOLATION_MASK			0x07FF
 
-/* MSTP port state registers - indexed by tree instancrSTI (tree ine */
+/* MSTP port state registers - indexed by tree instance */
 #define RTL8365MB_MSTI_CTRL_BASE			0x0A00
 #define RTL8365MB_MSTI_CTRL_REG(_msti, _physport) \
 		(RTL8365MB_MSTI_CTRL_BASE + ((_msti) << 1) + ((_physport) >> 3))