ravpower-mcu: remove target dependency

Remove the target dependency as the tool is also usable with other
battery-powered routers.

Signed-off-by: David Bauer <mail@david-bauer.net>

package/utils/ravpower-mcu/Makefile

@@ -17,7 +17,6 @@ define Package/ravpower-mcu
   SECTION:=utils
   CATEGORY:=Utilities
   TITLE:=Utility to control the RAVPower RP-WD009 PMIC
-  DEPENDS:=@TARGET_ramips_mt76x8
   URL:=https://github.com/blocktrron/ravpower-mcu/
 endef