ARM: rpi: add a couple more revision IDs

According to Gordon Henderson's WiringPi library, there are some more
Pi revision IDs out there. Add support for them.

http://git.drogon.net/?p=wiringPi;a=blob_plain;f=wiringPi/wiringPi.c;hb=5edd177112c99416f68ba3e8c6c4db6ed942e796

At least ID 0x13 is out in the wild:

Reported-by: Chee-Yang Chau <cychau@gmail.com>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>

board/raspberrypi/rpi/rpi.c

@@ -165,6 +165,16 @@ static const struct {
 		"bcm2835-rpi-a-plus.dtb",
 		false,
 	},
+	[BCM2835_BOARD_REV_B_PLUS_13] = {
+		"Model B+",
+		"bcm2835-rpi-b-plus.dtb",
+		true,
+	},
+	[BCM2835_BOARD_REV_CM_14] = {
+		"Compute Module",
+		"bcm2835-rpi-cm.dtb",
+		false,
+	},
 #endif
 };