configure: remove HOST_CC

$(HOST_CC) is only used to invoke the preprocessor, and $(CC) can be
used instead now that there is a Tricore C compiler.  Remove the variable
from config-host.mak.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

configure

@@ -1800,7 +1800,6 @@ fi
 mkdir -p tests/tcg
 echo "# Automatically generated by configure - do not modify" > $config_host_mak
 echo "SRC_PATH=$source_path" >> $config_host_mak
-echo "HOST_CC=$host_cc" >> $config_host_mak
 
 # versioned checked in the main config_host.mak above
 if test -n "$gdb_bin"; then

tests/tcg/tricore/Makefile.softmmu-target

@@ -28,7 +28,7 @@ TESTS += test_context_save_areas.c.tst
 QEMU_OPTS += -M tricore_testboard -cpu tc27x -nographic -kernel
 
 %.pS: $(ASM_TESTS_PATH)/%.S
-	$(HOST_CC) -E -o $@ $<
+	$(CC) -E -o $@ $<
 
 %.o: %.pS
 	$(AS) $(ASFLAGS) -o $@ $<