drm/rockchip: vop: improve and add more info to vop sysfs

drm/rockchip: vop: improve and add more info to vop sysfs

cat /sys/kernel/debug/dri/0/summary:

VOP [ff900000.vop]: ACTIVE
    Connector: DSI
        bus_format[0] output_mode[0]
    Display mode: 1200x1920p60
        clk[159390] real_clk[159390] type[8] flag[a]
        H: 1200 1280 1281 1341
        V: 1920 1955 1956 1981
    win0-0: DISABLED
    win1-0: DISABLED
    win2-0: ACTIVE
        format: XB24 little-endian (0x34324258)
        zpos: 0
        src: pos[0x0] rect[1200x1920]
        dst: pos[0x0] rect[1200x1920]
        buf[0]: addr: 0x0000000002d3a000 pitch: 4800 offset: 0
    win2-0: DISABLED
    win2-1: DISABLED
    win2-2: DISABLED
    win3-0: DISABLED
    win3-0: DISABLED
    win3-1: DISABLED
    win3-2: DISABLED
VOP [ff8f0000.vop]: DISABLED

Change-Id: I7811b2411bd9d2d52059d15645de399b0de5a49b
Signed-off-by: Mark Yao <mark.yao@rock-chips.com>