- added kernel xu4

rpi/config.txt

@@ -51,7 +51,7 @@
 ##     2        14:9
 ##     3        16:9
 ##
-#sdtv_aspect=3
+sdtv_aspect=3
 
 ## sdtv_disable_colourburst
 ##     Disables colour burst on composite output. The picture will be
@@ -519,7 +519,7 @@
 ##
 ##     Default 64
 ##
-gpu_mem=256
+gpu_mem=128
 
 ## gpu_mem_256
 ##     GPU memory allocation in MB for 256MB board revision.
@@ -755,7 +755,7 @@ gpu_mem=256
 ##
 ##     Default 700.
 ##
-#arm_freq=900
+arm_freq=900
 
 ## arm_freq_min
 ##     Minimum frequency of ARM in MHz (used for dynamic clocking).