staging: ccree: remove unnecessary cast on kmalloc

The assignment operator implicitly converts a void pointer to the type of the
pointer it is assigned to.

This issue was detected using Coccinelle and the following semantic patch:

@@
expression * e;
expression arg1, arg2;
type T;
@@

- e=(T*)
+ e=
kmalloc(arg1, arg2);

Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
Acked-by: Gilad Ben-Yossef <gilad@benyossef.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>