ARM: 7125/1: Add unwinding annotations for 64bit division functions

The 64bit division functions never had unwinding annotations
added. This prevents a backtrace from being printed within
the function and if a division by 0 occurs. Add the annotations.

Signed-off-by: Laura Abbott <lauraa@codeaurora.org>
Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>