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/include/mach/hardware.h

@@ -39,7 +39,7 @@
 #include <asm/sizes.h>
 #ifndef __ASSEMBLER__
 #include <asm/types.h>
-#include "../../mach-omap1/soc.h"
+#include <mach/soc.h>
 
 /*
  * NOTE: Please use ioremap + __raw_read/write where possible instead of these
@@ -72,6 +72,9 @@ static inline u32 omap_cs3_phys(void)
 
 #endif	/* ifndef __ASSEMBLER__ */
 
+#define OMAP1_IO_OFFSET		0x01000000	/* Virtual IO = 0xfefb0000 */
+#define OMAP1_IO_ADDRESS(pa)	IOMEM((pa) - OMAP1_IO_OFFSET)
+
 #include <mach/serial.h>
 
 /*