[ARM] 5137/1: magician: MACH_MAGICIAN doesn't need to depend on ARCH_PXA

It is only defined inside an "if ARCH_PXA ... endif" block, so the
depends on is not needed.

Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com&gt;?>
Acked-by: Eric Miao <eric.miao@marvell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>