tsif: remove error prints when clk_get() fails

Remove error prints when clk_get() fails in the driver's probe() function
and return the error code, to comply with deferred probing framework
requirements.

Change-Id: I65edbfe65ce01b01627910881f21b482dd2ba1a4
Signed-off-by: Liron Kuch <lkuch@codeaurora.org>