Improve mt6816 angle reading efficiency

[samguns]

It's a bit slow to send two reading commands for reading one angle value. We should take advantage of the "burst read" according to its datasheet.

[github-actions]

Memory usage change @ 8c18e88

Board	flash	%	RAM for global variables	%
adafruit:samd:adafruit_metro_m4	💚 -80 - 0	-0.02 - 0.0	N/A	N/A
rp2040:rp2040:rpipico	0 - 0	0.0 - 0.0	0 - 0	0.0 - 0.0
arduino:sam:arduino_due_x	🔺 0 - +120	0.0 - +0.02	N/A	N/A
arduino:samd:nano_33_iot	0 - 0	0.0 - 0.0	0 - 0	0.0 - 0.0
esp32:esp32:esp32	❔ -24 - +276	-0.0 - +0.02	0 - 0	0.0 - 0.0
esp32:esp32:esp32s2	❔ -24 - +308	-0.0 - +0.02	0 - 0	0.0 - 0.0
STMicroelectronics:stm32:GenF1:pnum=BLUEPILL_F103C8	0 - 0	0.0 - 0.0	0 - 0	0.0 - 0.0
STMicroelectronics:stm32:Nucleo_64:pnum=NUCLEO_F411RE	💚 -64 - 0	-0.01 - 0.0	0 - 0	0.0 - 0.0

Click for full report table

Board	examples/drivers/drv8316/drv8316_3pwm flash	%	examples/drivers/drv8316/drv8316_3pwm RAM for global variables	%	examples/drivers/drv8316/drv8316_6pwm flash	%	examples/drivers/drv8316/drv8316_6pwm RAM for global variables	%	examples/encoders/calibrated_sensor/calibration_save flash	%	examples/encoders/calibrated_sensor/calibration_save RAM for global variables	%	examples/encoders/linearhall flash	%	examples/encoders/linearhall RAM for global variables	%	examples/encoders/mt6816/mt6816_spi flash	%	examples/encoders/mt6816/mt6816_spi RAM for global variables	%	examples/encoders/calibrated_sensor/calibrated flash	%	examples/encoders/calibrated_sensor/calibrated RAM for global variables	%
adafruit:samd:adafruit_metro_m4	0	0.0	N/A	N/A	0	0.0	N/A	N/A	0	0.0	N/A	N/A	0	0.0	N/A	N/A	-80	-0.02	N/A	N/A
rp2040:rp2040:rpipico	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0
arduino:sam:arduino_due_x	0	0.0	N/A	N/A	0	0.0	N/A	N/A	0	0.0	N/A	N/A	0	0.0	N/A	N/A	120	0.02	N/A	N/A
arduino:samd:nano_33_iot	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0
esp32:esp32:esp32	-24	-0.0	0	0.0	-24	-0.0	0	0.0	-24	-0.0	0	0.0					276	0.02	0	0.0
esp32:esp32:esp32s2	-24	-0.0	0	0.0	-24	-0.0	0	0.0	-24	-0.0	0	0.0	-24	-0.0	0	0.0	308	0.02	0	0.0
STMicroelectronics:stm32:GenF1:pnum=BLUEPILL_F103C8	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0
STMicroelectronics:stm32:Nucleo_64:pnum=NUCLEO_F411RE	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	-64	-0.01	0	0.0	0	0.0	0	0.0

Click for full report CSV

Board,examples/drivers/drv8316/drv8316_3pwm<br>flash,%,examples/drivers/drv8316/drv8316_3pwm<br>RAM for global variables,%,examples/drivers/drv8316/drv8316_6pwm<br>flash,%,examples/drivers/drv8316/drv8316_6pwm<br>RAM for global variables,%,examples/encoders/calibrated_sensor/calibration_save<br>flash,%,examples/encoders/calibrated_sensor/calibration_save<br>RAM for global variables,%,examples/encoders/linearhall<br>flash,%,examples/encoders/linearhall<br>RAM for global variables,%,examples/encoders/mt6816/mt6816_spi<br>flash,%,examples/encoders/mt6816/mt6816_spi<br>RAM for global variables,%,examples/encoders/calibrated_sensor/calibrated<br>flash,%,examples/encoders/calibrated_sensor/calibrated<br>RAM for global variables,%
adafruit:samd:adafruit_metro_m4,0,0.0,N/A,N/A,0,0.0,N/A,N/A,0,0.0,N/A,N/A,0,0.0,N/A,N/A,-80,-0.02,N/A,N/A
rp2040:rp2040:rpipico,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0
arduino:sam:arduino_due_x,0,0.0,N/A,N/A,0,0.0,N/A,N/A,0,0.0,N/A,N/A,0,0.0,N/A,N/A,120,0.02,N/A,N/A
arduino:samd:nano_33_iot,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0
esp32:esp32:esp32,-24,-0.0,0,0.0,-24,-0.0,0,0.0,-24,-0.0,0,0.0,,,,,276,0.02,0,0.0
esp32:esp32:esp32s2,-24,-0.0,0,0.0,-24,-0.0,0,0.0,-24,-0.0,0,0.0,-24,-0.0,0,0.0,308,0.02,0,0.0
STMicroelectronics:stm32:GenF1:pnum=BLUEPILL_F103C8,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,,,,
STMicroelectronics:stm32:Nucleo_64:pnum=NUCLEO_F411RE,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,-64,-0.01,0,0.0,0,0.0,0,0.0