gpio: aggregator: fix macros coding style error

These changes just fix Linux Kernel Coding Style, no functional
improve.

-Macros with complex values should be enclosed in parentheses

Signed-off-by: Li Jun <lijun01@kylinos.cn>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20250731091637.595136-1-lijun01@kylinos.cn
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

Author: GT119119

drivers/gpio/gpio-aggregator.c

@@ -247,8 +247,8 @@ struct gpiochip_fwd {
 	unsigned long tmp[];		/* values and descs for multiple ops */
 };
 
-#define fwd_tmp_values(fwd)	&(fwd)->tmp[0]
-#define fwd_tmp_descs(fwd)	(void *)&(fwd)->tmp[BITS_TO_LONGS((fwd)->chip.ngpio)]
+#define fwd_tmp_values(fwd)	(&(fwd)->tmp[0])
+#define fwd_tmp_descs(fwd)	((void *)&(fwd)->tmp[BITS_TO_LONGS((fwd)->chip.ngpio)])
 
 #define fwd_tmp_size(ngpios)	(BITS_TO_LONGS((ngpios)) + (ngpios))