ramips: mmc: Add SD card support to HC5661A

Tested on HC5661A and it now fixes the issue that when enabling sd card
in HC5661A, the wan and 3 lan ports will down.

Known issue:
- When enabling SD card support, the led light of system will down and the rest 2 lights keep working.

Signed-off-by: LoveSy <[email protected]>

target/linux/ramips/dts/HC5661A.dts

@@ -22,6 +22,10 @@
 		reg = <0x0 0x8000000>;
 	};
 
+	sdhci@10130000 {
+		status = "okay";
+	};
+
 	gpio-leds {
 		compatible = "gpio-leds";
 

target/linux/ramips/image/mt76x8.mk

@@ -54,6 +54,7 @@ define Device/hc5661a
   DTS := HC5661A
   IMAGE_SIZE := $(ralink_default_fw_size_16M)
   DEVICE_TITLE := HiWiFi HC5661A
+  DEVICE_PACKAGES := kmod-sdhci-mt7620
 endef
 TARGET_DEVICES += hc5661a