ARM: 8694/1: Remove leftover of fixmap_page_table

fixmap_page_table was removed by commit 836a2418 (ARM: expand
fixmap region to 3MB), but some traces are still there - get rid of
them.

Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>