lpc32xx: add lpc32xx-spl.bin boot image target

Signed-off-by: Albert ARIBAUD (3ADEV) <albert.aribaud@3adev.fr>
diff --git a/common/image.c b/common/image.c
index a911aa9..162b682 100644
--- a/common/image.c
+++ b/common/image.c
@@ -149,6 +149,7 @@
 	{	IH_TYPE_MXSIMAGE,   "mxsimage",   "Freescale MXS Boot Image",},
 	{	IH_TYPE_ATMELIMAGE, "atmelimage", "ATMEL ROM-Boot Image",},
 	{	IH_TYPE_X86_SETUP,  "x86_setup",  "x86 setup.bin",    },
+	{	IH_TYPE_LPC32XXIMAGE, "lpc32xximage",  "LPC32XX Boot Image", },
 	{	-1,		    "",		  "",			},
 };