[GPIO] roll back GPIO base from 1000 to 0

Change-Id: I88358967e3b46e9325196ce110faa1ac9ddf6950
Reviewed-on: https://tp-biosrd-v02/gerrit/82014
Reviewed-by: Scorpio Chang(張志賢) <Scorpio_Chang@asus.com>
Tested-by: Scorpio Chang(張志賢) <Scorpio_Chang@asus.com>

Author: scorpiochang

include/asm-generic/gpio.h

@@ -25,7 +25,7 @@
  * actually an estimate of a board-specific value.
  */
 
-#define ARCH_GPIO_BASE		1000
+#define ARCH_GPIO_BASE		0
 
 #ifndef ARCH_NR_GPIOS
 #define ARCH_NR_GPIOS		512