spl: Use SPL_FIT_IMAGE_TINY for iMX9

Select SPL_FIT_IMAGE_TINY for i.MX9

Signed-off-by: Peng Fan <peng.fan@nxp.com>
diff --git a/common/spl/Kconfig b/common/spl/Kconfig
index 1358b45..a399a38 100644
--- a/common/spl/Kconfig
+++ b/common/spl/Kconfig
@@ -565,7 +565,7 @@
 	bool "Remove functionality from SPL FIT loading to reduce size"
 	depends on SPL_FIT
 	default y if MACH_SUN50I || MACH_SUN50I_H5 || SUN50I_GEN_H6
-	default y if ARCH_IMX8M
+	default y if ARCH_IMX8M || ARCH_IMX9
 	help
 	  Enable this to reduce the size of the FIT image loading code
 	  in SPL, if space for the SPL binary is very tight.