interconnect: qcom: Add check to return status of clk_bulk_prepare_enable

Since clk_bulk_prepare_enable function is defined with __must_check option,
add check to return status of clk_bulk_prepare_enable in qcom_icc_set
function.

Change-Id: I69fed5bdda38edfa89af3d899333d6e6f9f939f9
Signed-off-by: Naveen Yadav <naveenky@codeaurora.org>