ral unreferenced structures static.

Now that scoop gpio's are converted to generic_gpio,
tosascoop_device and tosascoop_jc_device don't have
to be exported.

Also make tosa_gpio_* static

Signed-off-by: Dmitry Baryshkov <dbaryshkov@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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