clk: remove prepare lock and bus voting in clk_debug_print_hw

Remove prepare lock and bus voting since they can be called
from an atomic context. Bandwidth voting is unnecessary as
print_hw_show already covers for the voting in debug
usecases.

Change-Id: Iba4106e16ea7d1ffab01bef175a57f34aacb0f05
Signed-off-by: David Dai <daidavid1@codeaurora.org>