Add more options to the AI thinker cam. (#4253)

* Add more options to the AI thinker cam.

The reason is power saving and compatibility of cheap chines clones with crappy flash chips.

boards.txt

@@ -4277,15 +4277,46 @@ esp32cam.build.mcu=esp32
 esp32cam.build.core=esp32
 esp32cam.build.variant=esp32
 esp32cam.build.board=ESP32_DEV
-esp32cam.build.f_cpu=240000000L
 esp32cam.build.flash_size=4MB
-esp32cam.build.flash_freq=80m
-esp32cam.build.flash_mode=dio
-esp32cam.build.boot=qio
 esp32cam.build.partitions=huge_app
 esp32cam.build.defines=-DBOARD_HAS_PSRAM -mfix-esp32-psram-cache-issue
 esp32cam.build.code_debug=0
 
+esp32cam.menu.CPUFreq.240=240MHz (WiFi/BT)
+esp32cam.menu.CPUFreq.240.build.f_cpu=240000000L
+esp32cam.menu.CPUFreq.160=160MHz (WiFi/BT)
+esp32cam.menu.CPUFreq.160.build.f_cpu=160000000L
+esp32cam.menu.CPUFreq.80=80MHz (WiFi/BT)
+esp32cam.menu.CPUFreq.80.build.f_cpu=80000000L
+esp32cam.menu.CPUFreq.40=40MHz (40MHz XTAL)
+esp32cam.menu.CPUFreq.40.build.f_cpu=40000000L
+esp32cam.menu.CPUFreq.26=26MHz (26MHz XTAL)
+esp32cam.menu.CPUFreq.26.build.f_cpu=26000000L
+esp32cam.menu.CPUFreq.20=20MHz (40MHz XTAL)
+esp32cam.menu.CPUFreq.20.build.f_cpu=20000000L
+esp32cam.menu.CPUFreq.13=13MHz (26MHz XTAL)
+esp32cam.menu.CPUFreq.13.build.f_cpu=13000000L
+esp32cam.menu.CPUFreq.10=10MHz (40MHz XTAL)
+esp32cam.menu.CPUFreq.10.build.f_cpu=10000000L
+
+esp32cam.menu.FlashMode.qio=QIO
+esp32cam.menu.FlashMode.qio.build.flash_mode=dio
+esp32cam.menu.FlashMode.qio.build.boot=qio
+esp32cam.menu.FlashMode.dio=DIO
+esp32cam.menu.FlashMode.dio.build.flash_mode=dio
+esp32cam.menu.FlashMode.dio.build.boot=dio
+esp32cam.menu.FlashMode.qout=QOUT
+esp32cam.menu.FlashMode.qout.build.flash_mode=dout
+esp32cam.menu.FlashMode.qout.build.boot=qout
+esp32cam.menu.FlashMode.dout=DOUT
+esp32cam.menu.FlashMode.dout.build.flash_mode=dout
+esp32cam.menu.FlashMode.dout.build.boot=dout
+
+esp32cam.menu.FlashFreq.80=80MHz
+esp32cam.menu.FlashFreq.80.build.flash_freq=80m
+esp32cam.menu.FlashFreq.40=40MHz
+esp32cam.menu.FlashFreq.40.build.flash_freq=40m
+
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 sparkfun_lora_gateway_1-channel.name=SparkFun LoRa Gateway 1-Channel