lcdringer: apply brcm2708 target rename to bcm27xx to dependencies

Since the brcm2708 target has been renamed to bcm27xx in openwrt
repo, update the dependency to the target in this package.

Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>

net/lcdringer/Makefile

@@ -31,7 +31,7 @@ include $(INCLUDE_DIR)/nls.mk
 define Package/lcdringer
   SECTION:=network
   CATEGORY:=Network
-  DEPENDS:=+libgee +libgstreamer1 +loudmouth @TARGET_brcm2708
+  DEPENDS:=+libgee +libgstreamer1 +loudmouth @TARGET_bcm27xx
   TITLE:=lcdringer
   URL:=https://www.flyn.org/projects/lcdringer/
 endef