pinctrl: fix compile test defaults

pinctrl: fix compile test defaults

Enabling compile testing should not enable every individual driver (we
have "allyesconfig" for that) but two new drivers got this wrong.

Default to n instead of ARCH_MICROCHIP as these drivers are not needed
in every Microchip build either.

Fixes: 38cf9d641314 ("pinctrl: add pic64gx "gpio2" pinmux driver")
Fixes: 46397274da22 ("pinctrl: add polarfire soc iomux0 pinmux driver")
Cc: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Linus Walleij <linusw@kernel.org>