Error (12002): Port "sdr_clk_clk" does not exist in macrofunction "u0"

Its not a syntax problem. The "cc_r2a_refdes_sdhc_cntrl_qsys" module does not have a port called pll_areset_conduit_export, but you are trying to connect pll_reset to it. did you forget to export it from your Qsys system, or did you get the name wrong?