Remove LITE-related dependency for app_kernel benchmark

Benchmark code that depends on the state of LITE-related symbols
has this dependency removed, and is now coded as if these symbols
are not defined. This change has no operational impact, as LITE-
related symbols were never defined.

Change-Id: I9b9a108223903b8e4dd675a599ca5b8e5cbe7fc7
Signed-off-by: Allan Stephens <allan.stephens@windriver.com>