ioctl: do not print explicit 0x prefix and do not specify minimum width

ioctl: do not print explicit 0x prefix and do not specify minimum width

Specifying output width for size argument is rather misleading - it can
be up to 14 bits in size.  The use of explicit "0x" prefix is
discouraged because 0x0 looks ugly.  Usage of width specification along
with alternate form flag leads to inconsistent output for 0.
Let's use just plain %#x qualifiers instead.

* ioctl.c (ioctl_print_code): Change printf qualifiers for ioctl command
type, number and size to "%#x".
* tests/ioctl.c (main): Update expected test output.
* tests/ioctl_dm.c (main): Likewise.
* tests/ioctl_evdev.c (main): Likewise.