ARM: pxa: change gpio to platform device

Remove most gpio macros and change gpio driver to platform driver.

Signed-off-by: Haojian Zhuang <haojian.zhuang@marvell.com>
diff --git a/arch/arm/mach-mmp/aspenite.c b/arch/arm/mach-mmp/aspenite.c
index fb7dfc1..edcbada 100644
--- a/arch/arm/mach-mmp/aspenite.c
+++ b/arch/arm/mach-mmp/aspenite.c
@@ -231,6 +231,7 @@
 	pxa168_add_nand(&aspenite_nand_info);
 	pxa168_add_fb(&aspenite_lcd_info);
 	pxa168_add_keypad(&aspenite_keypad_info);
+	platform_device_register(&pxa168_device_gpio);
 
 	/* off-chip devices */
 	platform_device_register(&smc91x_device);