ARM: dts: gemini: use the right rtc compatible

The rtc compatible was not following the dt-binding.
Signed-off-by: Corentin Labbe <clabbe@baylibre.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

arch/arm/boot/dts/gemini.dtsi

@@ -191,7 +191,7 @@ timer@43000000 {
 		};
 
 		rtc@45000000 {
-			compatible = "cortina,gemini-rtc";
+			compatible = "cortina,gemini-rtc", "faraday,ftrtc010";
 			reg = <0x45000000 0x100>;
 			interrupts = <17 IRQ_TYPE_LEVEL_HIGH>;
 			resets = <&syscon GEMINI_RESET_RTC>;