make would spit out a message like
	Generating /tmp/build/include/generated/asm-offsets.h
even when running with option "-s".  Fix this.
Signed-off-by: Wolfgang Denk <wd@denx.de>
 
 $(obj)include/generated/asm-offsets.h: $(obj)include/autoconf.mk.dep \
        $(obj)$(CPUDIR)/$(SOC)/asm-offsets.s
-       @echo Generating $@
+       @$(XECHO) Generating $@
        tools/scripts/make-asm-offsets $(obj)$(CPUDIR)/$(SOC)/asm-offsets.s $@
 
 $(obj)$(CPUDIR)/$(SOC)/asm-offsets.s:  $(obj)include/autoconf.mk.dep