esp_adc_cal/Remove lookup table

This commit removes the lookup table mode due to inferior performance when compared
to linear mode under attenuation 0, 1 and 2. However small portions of the lookup table
are kept for the higher voltages of atten 3 (above ADC reading 2880). That voltage range
in atten 3 has non linear characteristics making the LUT performan better than linear mode.

Author: Dazza0

components/esp_adc_cal/Kconfig

@@ -1,37 +1,27 @@
 menu "ADC-Calibration"
 
-config ADC_CAL_EFUSE_TP_DISABLE
-    bool "Disable Two Point values"
-    default "n"
+config ADC_CAL_EFUSE_TP_ENABLE
+    bool "Use Two Point Values"
+    default "y"
     help
-        Some ESP32s have Two Point calibration values burned into eFuse. Enabling
-        this option will prevent the ADC calibration component from using Two Point
-        values if they are available.
+        Some ESP32s have Two Point calibration values burned into eFuse BLOCK3.
+        This option will allow the ADC calibration component to characterize the
+        ADC-Voltage curve using Two Point values if they are available.
 
-config ADC_CAL_EFUSE_VREF_DISABLE
-    bool "Disable eFuse Vref"
-    default "n"
+config ADC_CAL_EFUSE_VREF_ENABLE
+    bool "Use eFuse Vref"
+    default "y"
     help
-        Some ESP32s have ADC Vref burned into eFuse. Enabling this option will
-        prevent the ADC calibration component from using eFuse Vref if they are 
-        available.
+        Some ESP32s have Vref burned into eFuse BLOCK0. This option will allow 
+        the ADC calibration component to characterize the ADC-Voltage curve using 
+        eFuse Vref if it is available.
 
-config ADC_CAL_DEFAULT_VREF_DISABLE
-    bool "Disable Default Vref"
-    default "n"
+config ADC_CAL_LUT_ENABLE
+    bool "Use Lookup Tables"
+    default "y"
     help
-        The esp_adc_cal_characterize() function requires the user to provide a
-        vref_default argument to be used if eFuse values are unavailable. Enabling
-        this option will prevent the ADC calibration component from using the 
-        vref_default argument. Note that if eFuse values are also unavailabe, 
-        the esp_adc_cal_characterize will trigger an abort.
-
-config ADC_CAL_NO_BLK3_RESERVE_FLAG
-    bool "EFUSE_BLK3_PART_RESERVE not set"
-    default "n"
-    help
-        By default, ESP32s will have the EFUSE_BLK3_PART_RESERVE flag set if it 
-        uses BLK3 of eFuse to store Two Point values. Some ESP32s do not set this
-        flag. Enable this option if that is the case 
+        This option will allow the ADC calibration component to use Lookup Tables
+        to correct for non-linear behavior in 11db attenuation. Other attenuations
+        do not exhibit non-linear behavior hence will not be affected by this option.
 
 endmenu  # ADC-Calibration