ARM: 8008/1: topology: Coding style fixes

Use kcalloc() and ULONG_MAX rather than open coding them.

Change-Id: Ie081604762e4c2769525afeefb2fb3b9dbaf1302
Signed-off-by: Mark Brown <broonie@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>