Mali: Increase voltage to fix some system instabilities

The previous mali voltage values were too low and causing the system to
throw random oops at high CPU load, eg. all cores at 100% at 1.4GHz.
Increasing the value fixes the random crashes.

Author: hgblob

drivers/gpu/arm/mali/platform/pegasus-m400/mali_platform.c

@@ -63,8 +63,10 @@ static struct clk  *mali_clock = 0;
 
 static unsigned int GPU_MHZ	= 1000000;
 
-int mali_gpu_clk = 533;//266;
-int mali_gpu_vol = 1075000;//900000
+/* Please take special care lowering these values, specially the voltage
+ * as it can cause system stability problems: random oops, usb hub resets */
+int mali_gpu_clk = 533; /* 533 MHz */
+int mali_gpu_vol = 1125000;/* 1.1125 V */
 
 #ifdef CONFIG_MALI_DVFS
 #define MALI_DVFS_DEFAULT_STEP 0