MX25: tx25: Fix build by making use of GPIO framework

Make use of GPIO framework and avoid the following build error:

tx25.c: In function 'tx25_fec_init':
tx25.c:73: error: dereferencing pointer to incomplete type
tx25.c:74: error: dereferencing pointer to incomplete type
tx25.c:75: error: dereferencing pointer to incomplete type
tx25.c:76: error: dereferencing pointer to incomplete type
tx25.c:83: error: dereferencing pointer to incomplete type
tx25.c:84: error: dereferencing pointer to incomplete type
tx25.c:114: error: dereferencing pointer to incomplete type
tx25.c:115: error: dereferencing pointer to incomplete type
tx25.c:116: error: dereferencing pointer to incomplete type
tx25.c:117: error: dereferencing pointer to incomplete type
tx25.c:124: error: dereferencing pointer to incomplete type
tx25.c:125: error: dereferencing pointer to incomplete type
tx25.c:126: error: dereferencing pointer to incomplete type

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Acked-by: Stefano Babic <sbabic@denx.de>

board/karo/tx25/tx25.c

@@ -28,6 +28,7 @@
 #include <asm/io.h>
 #include <asm/arch/imx-regs.h>
 #include <asm/arch/imx25-pinmux.h>
+#include <asm/gpio.h>
 
 static void mdelay(int n)
 {

include/configs/tx25.h

@@ -91,6 +91,8 @@
 #define CONFIG_BAUDRATE		115200	/* Default baud rate */
 #define CONFIG_SYS_BAUDRATE_TABLE	{ 9600, 19200, 38400, 57600, 115200 }
 
+#define CONFIG_MXC_GPIO
+
 /*
  * Flash & Environment
  */