pinctrl: vt8500: Duplicate address error in pinctrl list

Incorrect definition for WMT_PIN_WAKEUP1 causes a boottime warning:
pinctrl core: pin 16 already registered on pinctrl-wmt
pinctrl-wm8750 d8110000.pinctrl: error during pin registration

caused by a typo in pinctrl-wm8750.c:

Change WMT_PIN_WAKEUP1 to WMT_PIN(0, 17)

Signed-off-by: Tony Prisk <linux@prisktech.co.nz>
dts: vt8500: Incorrect PLL reference clock for WM8750

Add a 25Mhz reference clock for the WM8750, and reparent the PLL clocks
to use it.
Leave the UART clocks parented to the 24Mhz reference.

Signed-off-by: Tony Prisk <linux@prisktech.co.nz>