[PATCH kexec-tools] arm: do not build iomem.o target with no soruce

[Simon Horman]

Header files should be added to the distribution but not
used to derive targets for compilation. In this an attempt was
made to build iomem.o, but iomem.c does not exist so this fails.

Fixes: 1574ff1aae4f ("arm: include phys_to_virt.h and iomem.h in distribution")
Cc: Dave Young <dyoung at redhat.com>
Signed-off-by: Simon Horman <horms at verge.net.au>
---
 kexec/arch/arm/Makefile | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/kexec/arch/arm/Makefile b/kexec/arch/arm/Makefile
index 871979e0ae26..a1b730034de8 100644
--- a/kexec/arch/arm/Makefile
+++ b/kexec/arch/arm/Makefile
@@ -27,9 +27,9 @@ arm_KEXEC_SRCS += $(libfdt_SRCS)
 
 arm_UIMAGE = kexec/kexec-uImage.c
 arm_PHYS_TO_VIRT = kexec/arch/arm/phys_to_virt.c
-arm_PHYS_TO_VIRT += kexec/arch/arm/iomem.h
-arm_PHYS_TO_VIRT += kexec/arch/arm/phys_to_virt.h
+arm_PHYS_TO_VIRT_INCLUDE = kexec/arch/arm/iomem.h
+arm_PHYS_TO_VIRT_INCLUDE += kexec/arch/arm/phys_to_virt.h
 
 dist += kexec/arch/arm/Makefile $(arm_KEXEC_SRCS) $(arm_PHYS_TO_VIRT)	\
-	kexec/arch/arm/crashdump-arm.h kexec/arch/arm/kexec-arm.h	\
-	kexec/arch/arm/include/arch/options.h
+	$(arm_PHYS_TO_VIRT_INCLUDE) kexec/arch/arm/crashdump-arm.h \
+	kexec/arch/arm/kexec-arm.h kexec/arch/arm/include/arch/options.h
-- 
2.7.0.rc3.207.g0ac5344