brcm63xx: fix build with per-device rootfs

Signed-off-by: Felix Fietkau <nbd@nbd.name>

diff --git a/target/linux/brcm63xx/image/Makefile b/target/linux/brcm63xx/image/Makefile
index ca1792abf0c922485dcb940a1c05297ef5852f24..f5de6734fe60d1c7799951f661f609cdcd23ed39 100644 (file)
--- a/target/linux/brcm63xx/image/Makefile
+++ b/target/linux/brcm63xx/image/Makefile
@@ -98,7 +98,7 @@ $(shell expr substr "$(1)" 1 16)
 endef
 
 define Image/FileSystemStrip
-$(subst root.,,$(notdir $(1)))
+$(firstword $(subst +,$(space),$(subst root.,,$(notdir $(1)))))
 endef
 
 define Build/cfe-bin