staging: ccree: update TODO

Update TODO to reflect work done
Signed-off-by: NGilad Ben-Yossef <gilad@benyossef.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/ccree/TODO

@@ -6,5 +6,5 @@
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-1. Handle HW FIFO fullness more cleanly.
+1. ???