soc/intel/common: gpio: print error if pad is not found

Allow to print a debug error message when the GPIO community does not
contain the pad number from the motherboard configuration.

Change-Id: I21fb389a5d29e11b1fbc24e836d91e17957047f1
Signed-off-by: Maxim Polyakov <max.senia.poliak@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/40021
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Andrey Petrov <andrey.petrov@gmail.com>

src/soc/intel/common/block/gpio/gpio.c

@@ -89,7 +89,8 @@ static inline size_t gpio_group_index(const struct pad_community *comm,
 			return i;
 		}
 	}
-
+	printk(BIOS_ERR, "%s: pad %d is not found in community %s!\n",
+			__func__, relative_pad, comm->name);
 	assert(0);
 
 	return i;