clk: Gemini: fix struct name in kernel-doc

Fix a typo in the struct name in the kernel-doc notation so that
kernel-doc won't complain about it.

Fixes this warning:

drivers/clk/clk-gemini.c:64: warning: expecting prototype for struct gemini_data_data. Prototype was for struct gemini_gate_data instead

Fixes: 846423f9 ("clk: Add Gemini SoC clock controller")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reported-by: kernel test robot <lkp@intel.com>
Cc: linux-clk@vger.kernel.org
Link: https://lore.kernel.org/r/20211120062719.21395-1-rdunlap@infradead.org


Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>