can: flexcan: fix spelling mistake "reserverd" -> "reserved"

Fix a mistake in a register layout description.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20200214141751.21168-1-alexandre.belloni@bootlin.comSigned-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

drivers/net/can/flexcan.c

@@ -230,7 +230,7 @@ struct flexcan_regs {
 	/* FIFO-mode:
 	 *			MB
 	 * 0x080...0x08f	0	RX message buffer
-	 * 0x090...0x0df	1-5	reserverd
+	 * 0x090...0x0df	1-5	reserved
 	 * 0x0e0...0x0ff	6-7	8 entry ID table
 	 *				(mx25, mx28, mx35, mx53)
 	 * 0x0e0...0x2df	6-7..37	8..128 entry ID table