arm64: defconfig: Enable AM654x SDHCI controller

Enable CONFIG_SDHCI_AM654 to Support AM65x sdhci controller.
Signed-off-by: Faiz Abbas <faiz_abbas@ti.com>
Signed-off-by: Tero Kristo <t-kristo@ti.com>

arch/arm64/configs/defconfig

@@ -731,6 +731,7 @@ CONFIG_MMC_DW_ROCKCHIP=y
 CONFIG_MMC_SUNXI=y
 CONFIG_MMC_BCM2835=y
 CONFIG_MMC_SDHCI_XENON=y
+CONFIG_MMC_SDHCI_AM654=y
 CONFIG_MMC_OWL=y
 CONFIG_NEW_LEDS=y
 CONFIG_LEDS_CLASS=y