spl: Make SPL_DISABLE_BANNER_PRINT a positive option

Rather than having a negative option, make this a positive option and
enable it by default. This makes it easier to understand.
Reviewed-by: NTom Rini <trini@konsulko.com>
Signed-off-by: NSimon Glass <sjg@chromium.org>

common/spl/Kconfig

@@ -135,12 +135,21 @@ config SPL_SEPARATE_BSS
 	  location is used. Normally we put the device tree at the end of BSS
 	  but with this option enabled, it goes at _image_binary_end.
 
-config SPL_DISABLE_BANNER_PRINT
-	bool "Disable output of the SPL banner 'U-Boot SPL ...'"
+config SPL_BANNER_PRINT
+	bool "Enable output of the SPL banner 'U-Boot SPL ...'"
+	default y
+	help
+	  If this option is enabled, SPL will print the banner with version
+	  info. Disabling this option could be useful to reduce TPL boot time
+	  (e.g. approx. 6 ms faster, when output on i.MX6 with 115200 baud).
+
+config TPL_BANNER_PRINT
+	bool "Enable output of the TPL banner 'U-Boot TPL ...'"
+	default y
 	help
 	  If this option is enabled, SPL will not print the banner with version
-	  info. Selecting this option could be useful to reduce SPL boot time
-	  (e.g. approx. 6 ms slower, when output on i.MX6 with 115200 baud).
+	  info. Disabling this option could be useful to reduce SPL boot time
+	  (e.g. approx. 6 ms faster, when output on i.MX6 with 115200 baud).
 
 config SPL_DISPLAY_PRINT
 	bool "Display a board-specific message in SPL"

common/spl/spl.c

@@ -607,7 +607,7 @@ void preloader_console_init(void)
 
 	gd->have_console = 1;
 
-#ifndef CONFIG_SPL_DISABLE_BANNER_PRINT
+#if CONFIG_IS_ENABLED(BANNER_PRINT)
 	puts("\nU-Boot " SPL_TPL_NAME " " PLAIN_VERSION " (" U_BOOT_DATE " - "
 	     U_BOOT_TIME " " U_BOOT_TZ ")\n");
 #endif