The name of the output image for a fitImage that contains a ramdisk
should match the same as for the fitImage that does not contain a
ramdisk. As such it should not be assumed that KERNEL_IMAGETYPE is
"fitImage". This change explicitly sets the name of the output
ramdisk/initramfs to start with fitImage as does the non-ramdisk output.
Signed-off-by: Nathan Rossi <nathan@nathanrossi.com> Signed-off-by: Ross Burton <ross.burton@intel.com>