qcom: Add SM8250 Audio DSP firmware

Add test signed firmware ADSP.HT.5.3.c2-00055-SM8250-2 for the Qualcomm
SDM8250 Audio DSP.

Used on the Robotics RB5 platform.
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

WHENCE

@@ -5087,11 +5087,15 @@ File: qcom/sdm845/adspr.jsn
 File: qcom/sdm845/adspua.jsn
 File: qcom/sdm845/cdsp.mbn
 File: qcom/sdm845/cdspr.jsn
+File: qcom/sm8250/adsp.mbn
+File: qcom/sm8250/adspr.jsn
+File: qcom/sm8250/adspua.jsn
 
 Licence: Redistributable. See LICENSE.qcom and qcom/NOTICE.txt for details
 
 Binary files supplied originally from
 http://releases.linaro.org/96boards/dragonboard845c/qualcomm/firmware/RB3_firmware_20190529180356-v4.zip
+http://releases.linaro.org/96boards/rb5/qualcomm/firmware/RB5_firmware_20210118133815-v2.zip
 
 adsp.mbn has been converted from 20-adsp_split/firmware/adsp.* using
 https://github.com/andersson/pil-squasher

qcom/sm8250/adspr.jsn

+{
+    "sr_version": {
+        "major": 1,
+        "minor": 1,
+        "patch": 1
+    },
+    "sr_domain": {
+        "soc": "msm",
+        "domain": "adsp",
+        "subdomain": "root_pd",
+        "qmi_instance_id": 74
+    },
+    "sr_service": [
+        {
+            "provider": "tms",
+            "service": "servreg",
+            "service_data_valid": 0,
+            "service_data": 0
+        }
+    ]
+}
\ No newline at end of file

qcom/sm8250/adspua.jsn

+{
+    "sr_version": {
+        "major": 1,
+        "minor": 1,
+        "patch": 1
+    },
+    "sr_domain": {
+        "soc": "msm",
+        "domain": "adsp",
+        "subdomain": "audio_pd",
+        "qmi_instance_id": 74
+    },
+    "sr_service": [
+        {
+            "provider": "tms",
+            "service": "servreg",
+            "service_data_valid": 0,
+            "service_data": 0
+        },
+        {
+            "provider": "avs",
+            "service": "audio",
+            "service_data_valid": 0,
+            "service_data": 0
+        }
+    ]
+}
\ No newline at end of file