lib: utils/gpio: Generate FDT gpio driver list at compile-time

Instead of having FDT gpio driver list hard-coded in the C source,
we generate it using carray.sh at compile-time.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>

include/sbi_utils/gpio/fdt_gpio.h

@@ -12,6 +12,8 @@
 
 #include <sbi_utils/gpio/gpio.h>
 
+struct fdt_phandle_args;
+
 /** FDT based GPIO driver */
 struct fdt_gpio {
 	const struct fdt_match *match_table;