payloads: Pass $(CCACHE) on to in-tree payloads

Change-Id: Ie15aec4059fbeb99f714c3d674df5fabdb7c081c
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/47637
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
diff --git a/payloads/Makefile.inc b/payloads/Makefile.inc
index a8c07725..ec42143 100644
--- a/payloads/Makefile.inc
+++ b/payloads/Makefile.inc
@@ -29,9 +29,11 @@
 payloads/external/LinuxBoot \
 payloads/external/Yabits \
 
+payloads/coreinfo/build/coreinfo.elf coreinfo: export CCACHE := $(CCACHE)
 payloads/coreinfo/build/coreinfo.elf coreinfo:
 	$(MAKE) -C payloads/coreinfo defaultbuild
 
+payloads/nvramcui/build/nvramcui.elf nvramcui: export CCACHE := $(CCACHE)
 payloads/nvramcui/build/nvramcui.elf nvramcui:
 	$(MAKE) -C payloads/nvramcui