[PATCH] i386: CONFIG_ACPI_SRAT typo fix

Fix a typo involving CONFIG_ACPI_SRAT.

Signed-off-by: Magnus Damm <magnus@valinux.co.jp>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>