MIPS: JZ4770: Don't set deprecated fields of struct musb_hdrc_config

The driver ignores these fields.
MIPS: JZ4770: Fixed and completed USBPCR_IDPULLUP constants
USB: musb: JZ4770: Use constants instead of literals for USBPCR values
power: JZ4770: Improved documentation comment of act8600_q_set()
USB: musb: JZ4770: Toggle ACT8600 Q1 switch on mode switching
USB: musb: JZ4770: Disable pull-up of ID pin

Previously this was done in the board code, but since the musb glue
is SoC specific anyway, we can do it there instead.
MIPS: JZ4770: GCW0: Pull-up of USB OTG ID pin is now disabled in musb glue

See commit dd8852ac.