ARM: exynos_defconfig: replace SATA_AHCI_PLATFORM with AHCI_DWC driver

Commit 33629d35

 ("ata: ahci: Add DWC AHCI SATA controller support")
moved support for "snps,dwc-ahci" compatible (present in exynos5250.dtsi)
to separate DWC AHCI driver, so reflect this change in exynos_defconfig.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Link: https://lore.kernel.org/r/20230928202724.340420-1-m.szyprowski@samsung.com


Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>