Eliminates the following sparse warning:

	arch/arm/mach-omap1/board-h2.c:205:27: warning: symbol 'h2_nand_platdata' was not declared. Should it be static?
Signed-off-by: NAaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: NTony Lindgren <tony@atomide.com>