[PATCH] clk: stm32f4: avoid uninitialized variable access

[Stephen Boyd]

On 01/11, Arnd Bergmann wrote:
> The failure path in the newly added function tries to free an
> uninitialized pointer:
> 
> drivers/clk/clk-stm32f4.c: In function 'stm32f4_rcc_init':
> drivers/clk/clk-stm32f4.c:1106:4: error: 'gate' may be used uninitialized in this function [-Werror=maybe-uninitialized]
> 
> I'm adding an initialization to NULL here to make the kfree()
> succeed, and I'm also rearranging the cleanup so that the
> same kfree() is used for any error path, making the function
> slightly more robust against newly introduced bugs in the
> error handling.
> 
> Fixes: daf2d117cbca ("clk: stm32f4: Add lcd-tft clock")
> Signed-off-by: Arnd Bergmann <arnd at arndb.de>
> ---

Applied to clk-next. Seems I need to update my compiler to find
these warnings.

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