block: add REQ_URGENT to request flags
mali: DVFS Tweaks by maxfu.
1. Hardcoded mali_dvfs_threshold.
2. Force the GPU use lower frequencies as much as possible.
asv: Change initcall level to an earlier stage

We cannot wait for all device_initcall's (And subsequently module_init calls) to
complete before doing the ASV level readout without doing silly workarounds in
those drivers, waiting for an uninitialized exynos_result_of_asv.

Just change the ASV driver initialization from device stage to subsys stage, as
it is not dependant on other drivers or modules.
mali: Initialize gpu defaults properly after ASV change commit
kernel: Squashed updates from NX