spl: include timezone in banner

Include the timezone in the SPL banner so the timestamp matches with
that from u-boot proper.

Signed-off-by: Klaus Goger <klaus.goger@theobroma-systems.com>
Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>

common/spl/spl.c

@@ -479,7 +479,7 @@ void preloader_console_init(void)
 
 #ifndef CONFIG_SPL_DISABLE_BANNER_PRINT
 	puts("\nU-Boot SPL " PLAIN_VERSION " (" U_BOOT_DATE " - " \
-			U_BOOT_TIME ")\n");
+			U_BOOT_TIME " " U_BOOT_TZ ")\n");
 #endif
 #ifdef CONFIG_SPL_DISPLAY_PRINT
 	spl_display_print();