pen_release is no longer required as the synchronization
is now managed by generic arm code.
This is done as suggested in https://lkml.org/lkml/2013/6/4/184

Cc: Russell King <linux@arm.linux.org.uk>
Signed-off-by: NRohit Vaswani <rvaswani@codeaurora.org>
Signed-off-by: NStephen Boyd <sboyd@codeaurora.org>
Signed-off-by: NKumar Gala <galak@codeaurora.org>