Documentation: arm: remove dead links from Marvell Berlin docs

The BG2 and BG2Q are no longer listed on Marvell's site, so the links in
the README go nowhere. The BG2Q's product brief has also been removed.
Signed-off-by: NThomas Hebb <tommyhebb@gmail.com>
Signed-off-by: NJonathan Corbet <corbet@lwn.net>

Documentation/arm/Marvell/README

@@ -248,13 +248,10 @@ Berlin family (Multimedia Solutions)
 	88DE3100, Armada 1500
 		Design name:	BG2
 		Core:		Marvell PJ4B (ARMv7), Tauros3 L2CC
-		Homepage:	http://www.marvell.com/multimedia-solutions/armada-1500/
 		Product Brief:	http://www.marvell.com/multimedia-solutions/armada-1500/assets/Marvell-ARMADA-1500-Product-Brief.pdf
 	88DE3114, Armada 1500 Pro
 		Design name:	BG2Q
 		Core:		Quad Core ARM Cortex-A9, PL310 L2CC
-		Homepage:	http://www.marvell.com/multimedia-solutions/armada-1500-pro/
-		Product Brief:	http://www.marvell.com/multimedia-solutions/armada-1500-pro/assets/Marvell_ARMADA_1500_PRO-01_product_brief.pdf
 	88DE????
 		Design name:	BG3
 		Core:		ARM Cortex-A15, CA15 integrated L2CC