pinctrl: samsung: drop redundant drvdata assignment

pinctrl: samsung: drop redundant drvdata assignment

Fix W=1 warning:

  drivers/pinctrl/samsung/pinctrl-samsung.c: In function ‘samsung_gpio_set_direction’:
  drivers/pinctrl/samsung/pinctrl-samsung.c:633:42: warning: variable ‘drvdata’ set but not used [-Wunused-but-set-variable]

Fixes: f9c744747973 ("pinctrl: samsung: support a bus clock")
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202404300825.6lxLwvUY-lkp@intel.com/
Reviewed-by: André Draszik <andre.draszik@linaro.org>
Link: https://lore.kernel.org/r/20240430060304.12332-1-krzysztof.kozlowski@linaro.org
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>