treewide: use name in define and eval lines

For consistency, use full name instead of $(PKG_NAME) in define and eval
lines for all packages.

I've seen reviews that asked to do this before, and I am asking the same
during reviews now. To avoid this in the future, fix this treewide so
when people use existing packages as example, we will not have to
request this change anymore.

This makes all packages consistent with both LEDE and OpenWrt base
repositories.

Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>

net/dynapoint/Makefile

@@ -15,7 +15,7 @@ PKG_LICENSE:=GPL-3.0+
 
 include $(INCLUDE_DIR)/package.mk
 
-define Package/$(PKG_NAME)
+define Package/dynapoint
     SECTION:=net
     CATEGORY:=Network
     SUBMENU:=wireless
@@ -23,19 +23,19 @@ define Package/$(PKG_NAME)
     TITLE:=Dynamic access point manager
 endef
 
-define Package/$(PKG_NAME)/description
+define Package/dynapoint/description
   Dynapoint uses LUA scripts to allow dynamic access point creation
   and deletion depending on changes of certain network conditions.
 endef
 
-define Package/$(PKG_NAME)/conffiles
+define Package/dynapoint/conffiles
 /etc/config/dynapoint
 endef
 
 define Build/Compile
 endef
 
-define Package/$(PKG_NAME)/install
+define Package/dynapoint/install
 	$(INSTALL_DIR) $(1)/usr/sbin
 	$(INSTALL_BIN) ./src/dynapoint.lua $(1)/usr/sbin/
 	$(INSTALL_DIR) $(1)/etc/init.d
@@ -44,4 +44,4 @@ define Package/$(PKG_NAME)/install
 	$(INSTALL_DATA) ./src/dynapoint.config $(1)/etc/config/dynapoint
 endef
 
-$(eval $(call BuildPackage,$(PKG_NAME)))
+$(eval $(call BuildPackage,dynapoint))