feat(linux): AM62Lx: Add performance numbers for RTC Only mode

Add power measured in RTC Only low power mode and resume latency taken
to resume from RTC Only low power mode on AM62L EVM.

Signed-off-by: Akashdeep Kaur <a-kaur@ti.com>

Author: akashdeep-ti

source/devices/AM62LX/linux/Linux_Performance_Guide.rst

@@ -710,7 +710,7 @@ Power Performance
 ^^^^^^^^^^^^^^^^^
 
 These are power measurements taken while the device is in various low power modes like
-Deep Sleep and RTC Only + DDR.
+Deep Sleep, RTC Only + DDR, and RTC Only.
 
 .. csv-table:: Deep Sleep Power Performance
      :header: "Rail name","Rail voltage(V)","Power (mW)"
@@ -736,12 +736,25 @@ Deep Sleep and RTC Only + DDR.
      "vdd_rtc_1v8", "1.80", "0.02"
      "Total"," ","3.62"
 
+.. csv-table:: RTC Only Power Performance
+     :header: "Rail name","Rail voltage(V)","Power (mW)"
+
+     "vdd_core", "0.00", "0.00"
+     "soc_dvdd_1v8", "0.00", "0.00"
+     "soc_dvdd_3v3", "0.00", "0.00"
+     "vdda_1v8", "0.00", "0.00"
+     "vdd_lpddr4_pmic2", "0.00", "0.00"
+     "vdd_rtc", "0.75", "0.02"
+     "vdd_rtc_1v8", "1.80", "0.01"
+     "Total"," ","0.04"
+
 Resume Latency Performance
 ^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 .. csv-table:: LPM Resume Latency Performance
    :header: "Low Power Mode","Total Resume Latency (ms)"
 
+   "RTC Only", "Full cold boot (~seconds)"
    "RTC Only + DDR", "456.44"
    "Deep Sleep", "109.96"