[adc] Add P4 (#5185)

* [adc] Add P4

* Fix typo

Author: clydebarrow

components/sensor/adc.rst

@@ -114,11 +114,14 @@ ESP32 pins and Hardware Details
     * - ESP32-S3
       - GPIO1 - GPIO10
       - GPIO11 - GPIO20
+    * - ESP32-P4
+      - GPIO16 - GPIO23
+      - GPIO49 - GPIO54
 
 Different ESP32 variants use different ADC calibration methods:
 
 * Original ESP32 (non-variant) & ESP32-S2: Use line-fitting calibration
-* ESP32-C3, ESP32-C5, ESP32-C6, ESP32-H2 & ESP32-S3: Use curve-fitting calibration
+* ESP32-C3, ESP32-C5, ESP32-C6, ESP32-H2, ESP32-S3 & ESP32-P4: Use curve-fitting calibration
 
 This is handled automatically by the code, but it's worth noting if you're debugging ADC readings or need to understand the calibration process.