Netgear R7900 / R8000: build image without TRX KEY

Note: only cosmetic ...

release/src-rt-6.x.4708/Makefile

@@ -1378,10 +1378,10 @@ r8000init:
 	@$(MAKE) bin ARM=y BCM7=y NVRAM_64K=y NAND=y BCMSMP=y AC3200=y BSD=y DHDAP=y GMAC3=y NOWL=y DEBUGFS=y BCM_RECVFILE=y LINUX_MTD=32 B=E IPV6SUPP=y OPENVPN=y OPENSSL11=y BUILD_DESC="initial" NETGEAR_CHK="R8000" BOARDID_FILE="compatible_r8000.txt" FW_CFG_FILE="tomato_cfg.h"
 
 r8000e:
-	@$(MAKE) e ARM=y BCM7=y NVRAM_64K=y NAND=y BCMSMP=y ASUS_TRX="NETGEAR" AC3200=y BSD=y DHDAP=y GMAC3=y NOWL=y DEBUGFS=y BCM_RECVFILE=y LINUX_MTD=32 BRCM_NAND_JFFS2=y IRQBALANCE=y
+	@$(MAKE) e ARM=y BCM7=y NVRAM_64K=y NAND=y BCMSMP=y ASUS_TRX="NETGEAR" AC3200=y BSD=y DHDAP=y GMAC3=y NOWL=y DEBUGFS=y BCM_RECVFILE=y LINUX_MTD=32 BRCM_NAND_JFFS2=y IRQBALANCE=y NO_TRXKEY=y
 
 r8000z:
-	@$(MAKE) z ARM=y BCM7=y NVRAM_64K=y NAND=y BCMSMP=y ASUS_TRX="NETGEAR" AC3200=y BSD=y DHDAP=y GMAC3=y NOWL=y DEBUGFS=y BCM_RECVFILE=y LINUX_MTD=32 BRCM_NAND_JFFS2=y IRQBALANCE=y
+	@$(MAKE) z ARM=y BCM7=y NVRAM_64K=y NAND=y BCMSMP=y ASUS_TRX="NETGEAR" AC3200=y BSD=y DHDAP=y GMAC3=y NOWL=y DEBUGFS=y BCM_RECVFILE=y LINUX_MTD=32 BRCM_NAND_JFFS2=y IRQBALANCE=y NO_TRXKEY=y
 
 ac3200e:
 	@$(MAKE) e ARM=y BCM7=y NVRAM_64K=y NAND=y BCMSMP=y ASUS_TRX="ASUS" TUXERA=y TUXERA_HFS=y AC3200=y BSD=y DHDAP=y GMAC3=y NOWL=y DEBUGFS=y BCM_RECVFILE=y LINUX_MTD=64 BRCM_NAND_JFFS2=y IRQBALANCE=y