This dts adds support for Samsung Galaxy A7 smartphone released in 2015. Add a device tree for A7 with initial support for: - GPIO keys - Hall Sensor - SDHCI (internal and external storage) - USB Device Mode - UART (on USB connector via the SM5502 MUIC) - WCNSS (WiFi/BT) - Regulators - Touch key - Accelerometer/Magnetometer - Fuelgauge - NFC - Vibrator - Touchscreen