omap: headers: Move mtd-xip.h to be mach-omap1 specific

These registers are omap1 specific.

Signed-off-by: Tony Lindgren <tony@atomide.com>

diff --git a/arch/arm/plat-omap/include/mach/mtd-xip.h b/arch/arm/mach-omap1/include/mach/mtd-xip.h
similarity index 100%
rename from arch/arm/plat-omap/include/mach/mtd-xip.h
rename to arch/arm/mach-omap1/include/mach/mtd-xip.h