remoteproc: qcom: pas: Add missing power-domain "mxc" for CDSP

Add missing power-domain "mxc" required by CDSP PAS remoteproc on SM8350
SoC.

Fixes: e8b4e9a ("remoteproc: qcom: pas: Add SM8350 PAS remoteprocs")
Signed-off-by: Sibi Sankar <sibis@codeaurora.org>
Cc: stable@vger.kernel.org
Tested-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/1624559605-29847-1-git-send-email-sibis@codeaurora.org

Author: Sibi Sankar

drivers/remoteproc/qcom_q6v5_pas.c

@@ -652,6 +652,7 @@ static const struct adsp_data sm8350_cdsp_resource = {
 	.auto_boot = true,
 	.proxy_pd_names = (char*[]){
 		"cx",
+		"mxc",
 		NULL
 	},
 	.load_state = "cdsp",