ARM: dts: qcom: Add XO calibration NVMEM in PMK8550

WLAN has a requirement to trigger a PBS sequence for XO
calibration for factory testing. As part of this feature
expose a new register under PMK8550 SDAM2, which will
be used by PBS for reading XO trims settings.

Change-Id: I620b2d9d0ca6b7452f693ff665ddf995f17e4e2c
Signed-off-by: Kamal Wadhwa <quic_kamalw@quicinc.com>

qcom/pmk8550.dtsi

@@ -61,6 +61,10 @@
 				reg = <0x58 0x1>;
 			};
 
+			xo_calib_data: xo_calib-data@59 {
+				reg = <0x59 0x1>;
+			};
+
 			alarm_log: alarm-log@76 {
 				reg = <0x76 0x6>;
 			};