clk: qcom: common: only register reset controllers which define resets

Add a condition check to ensure that a reset controller is only
registered for a given clock controller inside of the
qcom_cc_really_probe() function if more than 0 resets are
defined for it.

Change-Id: Iffdfce1f7609ccab184a61c4a448a7edc15bb4ab
Signed-off-by: David Collins <collinsd@codeaurora.org>