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/vpnbypass/Makefile

@@ -11,7 +11,7 @@ PKG_MAINTAINER:=Stan Grishin <stangri@melmac.net>
 
 include $(INCLUDE_DIR)/package.mk
 
-define Package/$(PKG_NAME)
+define Package/vpnbypass
 	SECTION:=net
 	CATEGORY:=Network
 	DEPENDS:=+ip-full +ipset +iptables +ubox +dnsmasq-full
@@ -20,14 +20,14 @@ define Package/$(PKG_NAME)
 	PKGARCH:=all
 endef
 
-define Package/$(PKG_NAME)/description
+define Package/vpnbypass/description
 This service can be used to enable simple VPN split tunnelling.
 Supports accessing domains, IP ranges outside of your VPN tunnel.
 Also supports dedicating local ports/IP ranges for direct internet access (outside of your VPN tunnel).
 Please see the README for further information.
 endef
 
-define Package/$(PKG_NAME)/conffiles
+define Package/vpnbypass/conffiles
 /etc/config/vpnbypass
 endef
 
@@ -43,7 +43,7 @@ endef
 define Build/Compile
 endef
 
-define Package/$(PKG_NAME)/install
+define Package/vpnbypass/install
 	$(INSTALL_DIR) $(1)/etc/init.d
 	$(INSTALL_BIN) $(PKG_BUILD_DIR)/files/vpnbypass.init $(1)/etc/init.d/vpnbypass
 	$(INSTALL_DIR) $(1)/etc/config
@@ -52,4 +52,4 @@ define Package/$(PKG_NAME)/install
 	$(INSTALL_DATA) ./files/vpnbypass.hotplug $(1)/etc/hotplug.d/firewall/94-vpnbypass
 endef
 
-$(eval $(call BuildPackage,$(PKG_NAME)))
+$(eval $(call BuildPackage,vpnbypass))