bootstage: Don't build for HOSTCC

We don't measure boot timing on the host, or with SPL, so use both
conditions in the bootstage header. This allows us to avoid using
conditional compilation around bootstage_...() calls. (#ifdef)

Signed-off-by: Simon Glass <sjg@chromium.org>

include/bootstage.h

@@ -221,7 +221,7 @@ enum bootstage_id {
  */
 ulong timer_get_boot_us(void);
 
-#ifndef CONFIG_SPL_BUILD
+#if !defined(CONFIG_SPL_BUILD) && !defined(USE_HOSTCC)
 /*
  * Board code can implement show_boot_progress() if needed.
  *
@@ -233,7 +233,8 @@ void show_boot_progress(int val);
 #define show_boot_progress(val) do {} while (0)
 #endif
 
-#if defined(CONFIG_BOOTSTAGE) && !defined(CONFIG_SPL_BUILD)
+#if defined(CONFIG_BOOTSTAGE) && !defined(CONFIG_SPL_BUILD) && \
+	!defined(USE_HOSTCC)
 /* This is the full bootstage implementation */
 
 /**