thermal: exynos: Use the new thermal trend type for quick cooling action.

This patch uses the quick thermal cooling trend type macros. This is needed
as exynos5 and other thermal sensors now supports only interrupt method for
thresold temperature check.

Acked-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Amit Daniel Kachhap <amit.daniel@samsung.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>