FRV: Drop 'TOPDIR' from Makefiles

This patch drops TOPDIR from frv Makefiles.

Cc: David Howells <dhowells@redhat.com>
Signed-off-by: WANG Cong <xiyou.wangcong@gmail.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>

arch/frv/boot/Makefile

@@ -10,7 +10,7 @@
 
 targets := Image zImage bootpImage
 
-SYSTEM	=$(TOPDIR)/$(LINUX)
+SYSTEM	=$(LINUX)
 
 ZTEXTADDR	 = 0x02080000
 PARAMS_PHYS	 = 0x0207c000
@@ -45,7 +45,7 @@ zImage:	$(CONFIGURE) compressed/$(LINUX)
 bootpImage: bootp/bootp
 	$(OBJCOPY) -O binary -R .note -R .comment -S bootp/bootp $@
 
-compressed/$(LINUX): $(TOPDIR)/$(LINUX) dep
+compressed/$(LINUX): $(LINUX) dep
 	@$(MAKE) -C compressed $(LINUX)
 
 bootp/bootp: zImage initrd
@@ -59,10 +59,10 @@ initrd:
 # installation
 #
 install: $(CONFIGURE) Image
-	sh ./install.sh $(KERNELRELEASE) Image $(TOPDIR)/System.map "$(INSTALL_PATH)"
+	sh ./install.sh $(KERNELRELEASE) Image System.map "$(INSTALL_PATH)"
 
 zinstall: $(CONFIGURE) zImage
-	sh ./install.sh $(KERNELRELEASE) zImage $(TOPDIR)/System.map "$(INSTALL_PATH)"
+	sh ./install.sh $(KERNELRELEASE) zImage System.map "$(INSTALL_PATH)"
 
 #
 # miscellany