clk: qcom: Add clock measure support for DDR clock for TRINKET

Add measure_only_mccc_clk (memory controller clock controller)
to measure DDR frequency for trinket.

Change-Id: I1b9e55dcf045bf7df93c43ec51aa7bfc9df6bc2a
Signed-off-by: Diptanshu Jamgade <djamgade@codeaurora.org>