Added secondary device support

[egormanga]

Required for PowerPlay control device:

$ hidpp-list-features -d 7
Logitech USB Receiver (046d:c53a) is a HID++ 4.2 device
Feature 0x01: [0x0001] Feature set
Feature 0x02: [0x0003] Device FW version
Feature 0x03: [0x0005] Device name
Feature 0x04: [0x18a1] ? (hidden, internal)
Feature 0x05: [0x1e00] Enable hidden features (hidden)
Feature 0x06: [0x1eb0] ? (hidden, internal)
Feature 0x07: [0x00c2] DFUcontrol 3
Feature 0x08: [0x1801] ? (hidden, internal)
Feature 0x09: [0x1802] Device reset (hidden, internal)
Feature 0x0a: [0x1803] ? (hidden, internal)
Feature 0x0b: [0x8070] Color LED effects
Feature 0x0c: [0x1010] Charging control

[egormanga]

Oops, misclicked in my fork!