ARM: dts: realview: PB11MPCore: define a standard VGA panel

Let's supply a standard VGA panel by default on the PB11MPCore,
this will work with most monitors. If more screen real estate is
desired, users can update the DPI definition.

Cc: Pawel Moll <pawel.moll@arm.com>
Cc: Rob Herring <robh@kernel.org>
Cc: Russell King <linux@arm.linux.org.uk>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

arch/arm/boot/dts/arm-realview-pb11mp.dts

@@ -627,16 +627,17 @@
 					};
 				};
 
+				/* Standard 640x480 VGA timings */
 				panel-timing {
-					clock-frequency = <63500127>;
+					clock-frequency = <25175000>;
-					hactive = <1024>;
+					hactive = <640>;
-					hback-porch = <152>;
+					hback-porch = <48>;
-					hfront-porch = <48>;
+					hfront-porch = <16>;
-					hsync-len = <104>;
+					hsync-len = <96>;
-					vactive = <768>;
+					vactive = <480>;
-					vback-porch = <23>;
+					vback-porch = <33>;
-					vfront-porch = <3>;
+					vfront-porch = <10>;
-					vsync-len = <4>;
+					vsync-len = <2>;
 				};
 			};
 		};