firmware-gsmi: Delete an unnecessary check before the function call "dma_pool_destroy"
The dma_pool_destroy() function tests whether its argument is NULL
and then returns immediately. Thus the test around the call is not needed.
This issue was detected by using the Coccinelle software.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Cc: Greg KH <gregkh@linuxfoundation.org> Cc: Julia Lawall <julia.lawall@lip6.fr> Cc: Mike Waychison <mikew@google.com> Cc: Michel Lespinasse <walken@google.com> Signed-off-by: Matt Fleming <matt@codeblueprint.co.uk>