ARM: OMAP1: Remove relative includes

As discussed on linux-arm-kernel, we want to avoid
relative includes for the arch/arm/*omap* code:

http://www.spinics.net/lists/linux-omap/msg80520.html

Note that eventually when the omap1 specific drivers
are fixed to not use cpu_is_omap macros and not depend
on mach/hardware.h, this patch can be reverted and these
headers can be local. But since just fixing the drivers for
omap2+ is already a big enough hassle, let's deal
with that properly first.

[tony@atomide.com: also drop unused include for ispvideo.c]
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/mach-omap1/iomap.h

@@ -22,9 +22,6 @@
  * 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
-#define OMAP1_IO_OFFSET		0x01000000	/* Virtual IO = 0xfefb0000 */
-#define OMAP1_IO_ADDRESS(pa)	IOMEM((pa) - OMAP1_IO_OFFSET)
-
 /*
  * ----------------------------------------------------------------------------
  * Omap1 specific IO mapping