arch/x86: Drop stale comment

Change-Id: I1ba6dfb502ff053ccf82d2acc5fefbbfe09d647b
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/31294
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/arch/x86/include/arch/io.h

@@ -216,11 +216,6 @@ static __always_inline void write64(volatile void *addr,
 
 #define PNP_DEV(PORT, FUNC) (((PORT) << 8) | (FUNC))
 
-/* FIXME: We need to make the coreboot to run at 64bit mode, So when read/write
- * memory above 4G, We don't need to set %fs, and %gs anymore
- * Before that We need to use %gs, and leave %fs to other RAM access
- */
-
 #include <arch/pci_io_cfg.h>
 #include <arch/pci_mmio_cfg.h>