ARM: OMAP: TI81XX: Prepare for addition of TI814X support

This patch updates existing macros, functions used for TI816X, to enable
addition of other SoCs belonging to TI81XX family (e.g., TI814X).

The approach taken is to use TI81XX/ti81xx for code/data going to be common
across all TI81XX devices.

cpu_is_ti81xx() is introduced to handle code common across TI81XX devices.

In addition, ti8168_evm_map_io() is now replaced with ti81xx_map_io() and moved
in mach-omap2/common.c as same will be used for TI814X and is not board
specific.

Signed-off-by: Hemant Pedanekar <hemantp@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
diff --git a/arch/arm/mach-omap2/control.h b/arch/arm/mach-omap2/control.h
index d4ef75d..0ba68d3 100644
--- a/arch/arm/mach-omap2/control.h
+++ b/arch/arm/mach-omap2/control.h
@@ -52,8 +52,8 @@
 #define OMAP343X_CONTROL_PADCONFS_WKUP	0xa00
 #define OMAP343X_CONTROL_GENERAL_WKUP	0xa60
 
-/* TI816X spefic control submodules */
-#define TI816X_CONTROL_DEVCONF		0x600
+/* TI81XX spefic control submodules */
+#define TI81XX_CONTROL_DEVCONF		0x600
 
 /* Control register offsets - read/write with omap_ctrl_{read,write}{bwl}() */
 
@@ -244,8 +244,8 @@
 #define OMAP3_PADCONF_SAD2D_MSTANDBY   0x250
 #define OMAP3_PADCONF_SAD2D_IDLEACK    0x254
 
-/* TI816X CONTROL_DEVCONF register offsets */
-#define TI816X_CONTROL_DEVICE_ID	(TI816X_CONTROL_DEVCONF + 0x000)
+/* TI81XX CONTROL_DEVCONF register offsets */
+#define TI81XX_CONTROL_DEVICE_ID	(TI81XX_CONTROL_DEVCONF + 0x000)
 
 /*
  * REVISIT: This list of registers is not comprehensive - there are more