docs: Document --genzimage

ChangeLog

@@ -5,6 +5,9 @@
 # Distributed under the GPL v2
 # $Id$
 
+  13 Dec 2010; <sping@gentoo.org> doc/genkernel.8.txt, gen_cmdline.sh:
+  docs: Document --genzimage
+
   13 Dec 2010; <sping@gentoo.org> gen_cmdline.sh:
   Fix a reference to --nomenuconfig into --no-menuconfig
 

doc/genkernel.8.txt

@@ -277,6 +277,9 @@ INITIALIZATION
 *--busybox-config*=<file>::
     Specifies a user created busybox config.
 
+*--genzimage*::
+	Make and install kernelz image from 'arch/powerpc/boot/zImage.initrd'.
+
 *--disklabel*::
     Include disk label and uuid support in your initrd.
 

gen_cmdline.sh

@@ -91,6 +91,7 @@ longusage() {
   echo "	--bootloader=grub	Add new kernel to GRUB configuration"
   echo "	--linuxrc=<file>	Specifies a user created linuxrc"
   echo "	--busybox-config=<file>	Specifies a user created busybox config"
+  echo "	--genzimage		Make and install kernelz image (PowerPC)"
   echo "	--disklabel		Include disk label and uuid support in your"
   echo "				ramdisk"
   echo "	--luks			Include LUKS support"