wpcm regression

[neuschaefer]

6.3 doesn't boot well:

[    0.550000] wpcm450-pinctrl b8003000.pinctrl: error -ENOTSUPP: Failed to find nuvoton,wpcm450-gcr
[    0.570000] wpcm450-pinctrl: probe of b8003000.pinctrl failed with error -524
[    0.660000] Serial: 8250/16550 driver, 6 ports, IRQ sharing disabled
[    0.700000] b8000100.serial: ttyS1 at MMIO 0xb8000100 (irq = 17, base_baud = 1500000) is a Nuvoton 16550
...
[   11.360000] platform b8000000.serial: deferred probe pending

• upstream regmap fix
• upstream MFD_SYSCON fix