Attempt to LG G4 compatibility
Attempt to LG G4 compatibility

lsusb from @invisiblek, unfortunately it seems to hang when used in
VirtualBox (USB passthrough from Windows to Linux).

The second CD of exposes the endpoints over bInterfaceNumber 2, so this
patch simply activates the second CD.

LG G4 (1004:6298) has this device descriptor:

    ...
    idVendor           0x1004 LG Electronics, Inc.
    idProduct          0x6298
    bcdDevice            3.10
    iManufacturer           1 LG Electronics Inc.
    iProduct                2 LGE Android Phone
    iSerial                 3 VS986xxxxxxxx
    bNumConfigurations      2
    Configuration Descriptor:
      ...
      bNumInterfaces          1
      bConfigurationValue     1
      ...
      Interface Descriptor:
        ...
        bNumEndpoints           3
        bInterfaceClass         6 Imaging
        bInterfaceSubClass      1 Still Image Capture
        bInterfaceProtocol      1 Picture Transfer Protocol (PIMA 15470)
        iInterface              5 MTP
        ...
        (EP 1 IN  Bulk)
        (EP 1 OUT Bulk)
        (EP 2 IN  Intr)
        ...
    Configuration Descriptor:
      ...
      bNumInterfaces          4
      bConfigurationValue     2
      ...
      Interface Descriptor:
        ...
        bNumEndpoints           3
        bInterfaceClass         6 Imaging
        bInterfaceSubClass      1 Still Image Capture
        bInterfaceProtocol      1 Picture Transfer Protocol (PIMA 15470)
        iInterface              6 MTP
        ...
        (EP 1 IN  Bulk)
        (EP 1 OUT Bulk)
        (EP 2 IN  Intr)
        ...
      Interface Association:
        bLength                 8
        bDescriptorType        11
        bFirstInterface         1
        bInterfaceCount         2
        bFunctionClass          2 Communications
        bFunctionSubClass       2 Abstract (modem)
        bFunctionProtocol       1 AT-commands (v.25ter)
        iFunction               9 CDC Serial
      Interface Descriptor:
        ...
        bNumEndpoints           1
        bInterfaceClass         2 Communications
        bInterfaceSubClass      2 Abstract (modem)
        bInterfaceProtocol      1 AT-commands (v.25ter)
        iInterface              7 CDC Abstract Control Model (ACM)
        ...
        (EP 4 IN  Intr)
      Interface Descriptor:
        ...
        bNumEndpoints           2
        bInterfaceClass        10 CDC Data
        bInterfaceSubClass      0
        bInterfaceProtocol      0
        iInterface              8 CDC ACM Data
        (EP 3 IN  Bulk)
        (EP 2 Out Bulk)
      Interface Descriptor:
        ...
        bInterfaceNumber        2
        bAlternateSetting       0
        bNumEndpoints           2
        bInterfaceClass       255 Vendor Specific Class
        bInterfaceSubClass    255 Vendor Specific Subclass
        bInterfaceProtocol    255 Vendor Specific Protocol
        iInterface              0
        (EP 5 IN  Bulk)
        (EP 3 OUT Bulk)
        ...

Lekensteyn/lglaf