Added ioctl UI_DEV_SETUP call before UI_DEV_CREATE

The current implementation using fwrite() was causing new device
events not to be properly identified on Wayland (Sway), rendering
the udevice useless.

This change moves the code closer to the reference kernel impl
from https://kernel.org/doc/html/v6.2/input/uinput.html

uinput.go

@@ -139,7 +139,7 @@ func createUsbDevice(deviceFile *os.File, dev uinputUserDev) (fd *os.File, err e
 		_ = deviceFile.Close()
 		return nil, fmt.Errorf("failed to write user device buffer: %v", err)
 	}
-	_, err = deviceFile.Write(buf.Bytes())
+	err = ioctl(deviceFile, uiDevSetup, uintptr(unsafe.Pointer(buf)))
 	if err != nil {
 		_ = deviceFile.Close()
 		return nil, fmt.Errorf("failed to write uidev struct to device file: %v", err)

uinputdefs.go

@@ -7,6 +7,7 @@ const (
 	uinputMaxNameSize = 80
 	uiDevCreate       = 0x5501
 	uiDevDestroy      = 0x5502
+	uiDevSetup        = 0x405c5503
 	// this is for 64 length buffer to store name
 	// for another length generate using : (len << 16) | 0x8000552C
 	uiGetSysname = 0x8041552c