msm: camera: Allow zero as valid input to enable_clk()

Currently enable_clk() returns error for 0 rate. But some modules may not
want to set a rate, only vote for the clock. Hence, 0 can be valid as input
parameter.
Also, modify the index of string to be read into src-clock-name.

Change-Id: Ie1d777b36fb5f5f26d1ad33586ec0ba69250969a
Signed-off-by: Harsh Shah <harshs@codeaurora.org>
1 file changed