gemini: Fix kmod-led-trig-heartbeat typo

It's kmod-ledtrig-* not kmod-led-trig-*.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
[extended subject]
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>

target/linux/gemini/Makefile

@@ -26,7 +26,7 @@ include $(INCLUDE_DIR)/target.mk
 DEFAULT_PACKAGES += \
 	kmod-usb-core kmod-usb-fotg210 \
 	kmod-usb-ledtrig-usbport \
-	kmod-leds-gpio kmod-led-trig-heartbeat \
+	kmod-leds-gpio kmod-ledtrig-heartbeat \
 	kmod-gpio-button-hotplug
 
 $(eval $(call BuildTarget))