staging: dwc2: reorder some kernel doc comments and struct members

Reorder the kernel doc comments for 'struct dwc2_core_params' to
match the ordering in the struct itself. Reorder the members of
'struct dwc2_qh' (and its kerneldoc comments) to minimize the
amount of structure padding.

Signed-off-by: Paul Zimmerman <paulz@synopsys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>