global_data: Convert have_console into a flag

We don't need a full word for this boolean value. Convert it into a flag
to save space in global_data.

Reviewed-by: Alexander Sverdlin <alexander.sverdlin@siemens.com>
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/arm/mach-exynos/spl_boot.c b/arch/arm/mach-exynos/spl_boot.c
index bd5a064..219d7fb 100644
--- a/arch/arm/mach-exynos/spl_boot.c
+++ b/arch/arm/mach-exynos/spl_boot.c
@@ -312,7 +312,7 @@
 	memzero((void *)gd, sizeof(gd_t));
 	gd->flags |= GD_FLG_RELOC;
 	gd->baudrate = CONFIG_BAUDRATE;
-	gd->have_console = 1;
+	gd->flags |= GD_FLG_HAVE_CONSOLE;
 }
 
 void board_init_f(unsigned long bootflag)