NUVOTON: SPI: Fix undeclared function gpio_set

ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]

Author: ccli8

targets/TARGET_NUVOTON/TARGET_M251/spi_api.c

@@ -23,6 +23,7 @@
 #include "cmsis.h"
 #include "pinmap.h"
 #include "PeripheralPins.h"
+#include "gpio_api.h"
 #include "nu_modutil.h"
 #include "nu_miscutil.h"
 #include "nu_bitutil.h"

targets/TARGET_NUVOTON/TARGET_M261/spi_api.c

@@ -23,6 +23,7 @@
 #include "mbed_error.h"
 #include "pinmap.h"
 #include "PeripheralPins.h"
+#include "gpio_api.h"
 #include "nu_modutil.h"
 #include "nu_miscutil.h"
 #include "nu_bitutil.h"

targets/TARGET_NUVOTON/TARGET_M451/spi_api.c

@@ -21,6 +21,7 @@
 #include "cmsis.h"
 #include "pinmap.h"
 #include "PeripheralPins.h"
+#include "gpio_api.h"
 #include "nu_modutil.h"
 #include "nu_miscutil.h"
 #include "nu_bitutil.h"

targets/TARGET_NUVOTON/TARGET_NANO100/spi_api.c

@@ -21,6 +21,7 @@
 #include "cmsis.h"
 #include "pinmap.h"
 #include "PeripheralPins.h"
+#include "gpio_api.h"
 #include "nu_modutil.h"
 #include "nu_miscutil.h"
 #include "nu_bitutil.h"

targets/TARGET_NUVOTON/TARGET_NUC472/spi_api.c

@@ -21,6 +21,7 @@
 #include "cmsis.h"
 #include "pinmap.h"
 #include "PeripheralPins.h"
+#include "gpio_api.h"
 #include "nu_modutil.h"
 #include "nu_miscutil.h"
 #include "nu_bitutil.h"