mkimage: Document misc options

Over the years, several options have not made it into the help message.
Document them. Do the same for the man page.

Signed-off-by: Sean Anderson <sean.anderson@seco.com>
diff --git a/tools/mkimage.c b/tools/mkimage.c
index be58e56..5c6a60e 100644
--- a/tools/mkimage.c
+++ b/tools/mkimage.c
@@ -84,7 +84,8 @@
 	fprintf(stderr, "Error: %s\n", msg);
 	fprintf(stderr, "Usage: %s [-T type] -l image\n"
 			 "          -l ==> list image header information\n"
-			 "          -T ==> parse image file as 'type'\n",
+			 "          -T ==> parse image file as 'type'\n"
+			 "          -q ==> quiet\n",
 		params.cmdname);
 	fprintf(stderr,
 		"       %s [-x] -A arch -O os -T type -C comp -a addr -e ep -n name -d data_file[:data_file...] image\n"
@@ -95,8 +96,11 @@
 		"          -a ==> set load address to 'addr' (hex)\n"
 		"          -e ==> set entry point to 'ep' (hex)\n"
 		"          -n ==> set image name to 'name'\n"
+		"          -R ==> set second image name to 'name'\n"
 		"          -d ==> use image data from 'datafile'\n"
-		"          -x ==> set XIP (execute in place)\n",
+		"          -x ==> set XIP (execute in place)\n"
+		"          -s ==> create an image with no data\n"
+		"          -v ==> verbose\n",
 		params.cmdname);
 	fprintf(stderr,
 		"       %s [-D dtc_options] [-f fit-image.its|-f auto|-F] [-b <dtb> [-b <dtb>]] [-E] [-B size] [-i <ramdisk.cpio.gz>] fit-image\n"
@@ -107,7 +111,9 @@
 		"          -f => input filename for FIT source\n"
 		"          -i => input filename for ramdisk file\n"
 		"          -E => place data outside of the FIT structure\n"
-		"          -B => align size in hex for FIT structure and header\n");
+		"          -B => align size in hex for FIT structure and header\n"
+		"          -b => append the device tree binary to the FIT\n"
+		"          -t => update the timestamp in the FIT\n");
 #ifdef CONFIG_FIT_SIGNATURE
 	fprintf(stderr,
 		"Signing / verified boot options: [-k keydir] [-K dtb] [ -c <comment>] [-p addr] [-r] [-N engine]\n"
@@ -118,7 +124,8 @@
 		"          -F => re-sign existing FIT image\n"
 		"          -p => place external data at a static position\n"
 		"          -r => mark keys used as 'required' in dtb\n"
-		"          -N => openssl engine to use for signing\n");
+		"          -N => openssl engine to use for signing\n"
+		"          -o => algorithm to use for signing\n");
 #else
 	fprintf(stderr,
 		"Signing / verified boot not supported (CONFIG_FIT_SIGNATURE undefined)\n");