Davinci: ea20: use gpio framework to access gpios

Drop direct access to SOC's registers and use
the function of the GPIO driver for da8xx.

[Tom: Remove gpio[68]_base as it's now unused]

Signed-off-by: Stefano Babic <sbabic@denx.de>
CC: Bastian Ruppert <Bastian.Ruppert@Sewerin.de>
CC: dzu@denx.de
CC: Sandeep Paulraj <s-paulraj@ti.com>
Signed-off-by: Tom Rini <trini@ti.com>

include/configs/ea20.h

@@ -48,6 +48,7 @@
 #define CONFIG_SYS_HZ			1000
 #define CONFIG_SKIP_LOWLEVEL_INIT
 #define CONFIG_SYS_TEXT_BASE		0xc1080000
+#define CONFIG_DA8XX_GPIO
 
 /*
  * Memory Info
@@ -167,6 +168,7 @@
 #define CONFIG_CMD_SAVES
 #define CONFIG_CMD_MEMORY
 #define CONFIG_CMD_I2C
+#define CONFIG_CMD_GPIO
 
 #ifdef CONFIG_CMD_BDI
 #define CONFIG_CLOCKS