msm: vidc: amend video driver and firmware logging

Route all firmware logs to custom tracer by default
custom tracer logs can be enabled using
    "echo msm_vidc_events:* >> /d/tracing/set_event"
custom tracer logs can be collected using
    cat /d/tracing/trace_pipe > trace.txt
New log masks:
    VIDC_ERR        = 0x00000001,
    VIDC_WARN       = 0x00000002,
    VIDC_INFO       = 0x00000004,
    VIDC_DBG        = 0x00000008,
    VIDC_PROF       = 0x00000010,
    VIDC_PKT        = 0x00000020,
    VIDC_PRINTK     = 0x00001000,
    VIDC_FTRACE     = 0x00002000,
    FW_LOW          = 0x00010000,
    FW_MEDIUM       = 0x00020000,
    FW_HIGH         = 0x00040000,
    FW_ERROR        = 0x00080000,
    FW_FATAL        = 0x00100000,
    FW_PERF         = 0x00200000,
    FW_PRINTK       = 0x10000000,
    FW_FTRACE       = 0x20000000,
12 bits [0 .. 11]  are driver log level mask,
4 bits  [12 .. 15] are driver log route,
12 bits [16 .. 27] are firmware log level,
4 bits  [28 .. 31] are firmware log route.

Change-Id: Ib65ac3bdd6ad535775aaed4adf1df3c7b03681a8
Signed-off-by: Shi Zhongbo <zhongbos@codeaurora.org>