Add support for ATM90E26 (#4366)

Co-authored-by: Jesse Hills <3060199+jesserockz@users.noreply.github.com>

tests/test1.yaml

@@ -483,6 +483,25 @@ sensor:
     nir:
       name: NIR
     i2c_id: i2c_bus
+  - platform: atm90e26
+    cs_pin: 5
+    voltage:
+      name: Line Voltage
+    current:
+      name: CT Amps
+    power:
+      name: Active Watts
+    power_factor:
+      name: Power Factor
+    frequency:
+      name: Line Frequency
+    line_frequency: 50Hz
+    meter_constant: 1000
+    pl_const: 1429876
+    gain_pga: 1X
+    gain_metering: 7481
+    gain_voltage: 26400
+    gain_ct: 31251
   - platform: atm90e32
     cs_pin: 5
     phase_a: