Command Queuing was enabled completely for J721e controllers which lead
to partial enablement even for Am65x. Complete CQ implementation for
AM65x by adding the irq callback.

Fixes: f545702b ("mmc: sdhci_am654: Add Support for Command Queuing Engine to J721E")
Cc: stable@vger.kernel.org
Signed-off-by: Faiz Abbas <faiz_abbas@ti.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Link: https://lore.kernel.org/r/20200108143301.1929-4-faiz_abbas@ti.comSigned-off-by: Ulf Hansson <ulf.hansson@linaro.org>