ARM: 6320/1: ftrace: enable dynamic ftrace

Dynamic ftrace for ARM has been disabled since 07c4cc1c ("ftrace:
disable dynamic ftrace for all archs that use daemon").  Now that the
code has been updated, re-enable it.

Signed-off-by: Rabin Vincent <rabin@rab.in>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>