refactor(arm): remove ARM_ROTPK_KEY_LEN comparison

Removing ARM_ROTPK_KEY_LEN definition and comparison in full key .S
files since there is little value in comparing the defined value with a
static size. This becomes more maintenance than value addition.

Removing defines no longer required and general clean up of .S full key
files.

Change-Id: Id286b7078ab9e190e37a43804e2a8d1b0934c235
Signed-off-by: Lauren Wehrmeister <lauren.wehrmeister@arm.com>
4 files changed