arm: delay: annotate delay constant as unsigned long

Currently the __udelay function causes the following compiler warning
when HZ is set to 1000:

arch/arm/lib/delay.c: In function __udelay:
arch/arm/lib/delay.c:88: warning: integer overflow in expression

The overflow does not occur if the constant is unsigned.

Signed-off-by: Jeff Ohlstein <johlstei@codeaurora.org>
1 file changed