ARM: remove old SA-1111.h

All (in tree) users of old mach/SA-1111.h were already updated to
include asm/hardware/sa1111.h in v2.6.12-rc2. The old header can safely
be removed now.

Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>