[source] ipq-wifi: fix missing define of PKG_NAME

[LEDE Commits]

blogic pushed a commit to source.git, branch master:
https://git.lede-project.org/40fd77fd10e70b7877655c35a03683b9da38e677

commit 40fd77fd10e70b7877655c35a03683b9da38e677
Author: Chen Minqiang <ptpt52 at gmail.com>
AuthorDate: Wed Sep 20 10:20:09 2017 +0800

    ipq-wifi: fix missing define of PKG_NAME
    
    Signed-off-by: Chen Minqiang <ptpt52 at gmail.com>
---
 package/firmware/ipq-wifi/Makefile | 1 +
 1 file changed, 1 insertion(+)

diff --git a/package/firmware/ipq-wifi/Makefile b/package/firmware/ipq-wifi/Makefile
index 2f1b280..aec8bf2 100644
--- a/package/firmware/ipq-wifi/Makefile
+++ b/package/firmware/ipq-wifi/Makefile
@@ -1,6 +1,7 @@
 include $(TOPDIR)/rules.mk
 include $(INCLUDE_DIR)/version.mk
 
+PKG_NAME:=ipq-wifi
 PKG_RELEASE:=1
 
 include $(INCLUDE_DIR)/package.mk