arm64: defconfig: Enable CIX Sky1 pinctrl, PCIe host, and Cadence GPIO

Enable the CIX Sky1 pinctrl driver (PINCTRL_SKY1), CIX Sky1 PCIe host
controller (PCI_SKY1_HOST), and Cadence GPIO controller (GPIO_CADENCE)
for the Radxa Orion O6 board which uses the CIX Sky1 SoC.

The pinctrl driver is a dependency for other on-SoC peripherals. The
Cadence-based PCIe host controller enables use of PCIe peripherals on
the board. The Cadence GPIO controller provides GPIO support for the
SoC.

Cc: Yunseong Kim <ysk@kzalloc.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Signed-off-by: Peter Chen <peter.chen@cixtech.com>