pinctrl: samsung: staticize fsd_pin_ctrl

struct fsd_pin_ctrl is not used outside of the file, so it can be made
static.  This fixes sparse warning:

  drivers/pinctrl/samsung/pinctrl-exynos-arm64.c:773:31: sparse:
    symbol 'fsd_pin_ctrl' was not declared. Should it be static?

Reported-by: kernel test robot <[email protected]>
Fixes: 0d1b662 ("pinctrl: samsung: add FSD SoC specific data")
Signed-off-by: Krzysztof Kozlowski <[email protected]>
Reviewed-by: Alim Akhtar <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

Author: krzk

drivers/pinctrl/samsung/pinctrl-exynos-arm64.c

@@ -770,7 +770,7 @@ static const struct samsung_pin_bank_data fsd_pin_banks2[] __initconst = {
 	EXYNOS850_PIN_BANK_EINTN(3, 0x00, "gpq0"),
 };
 
-const struct samsung_pin_ctrl fsd_pin_ctrl[] __initconst = {
+static const struct samsung_pin_ctrl fsd_pin_ctrl[] __initconst = {
 	{
 		/* pin-controller instance 0 FSYS0 data */
 		.pin_banks	= fsd_pin_banks0,