Fix Cap LoRa 1262 invalid initialization

[MultiMote]

Hello. Current version does not initialize LoRa Cap correctly. +3.3v not is not present on "SW" pin (io expander P0) of "Stamp LoRa-1262 Mini".

1.

    // Step 1: Enable power to I/O expander on LoRa Cap (GPIO 46)
    pinMode(46, OUTPUT);
    digitalWrite(46, HIGH);
    delay(100);  // Give I/O expander time to power up

GPIO46 not goes to IO expander, it goes to output of audio codec

2.

M5.In_I2C.writeRegister8(0x43, 0x03, 0x00, 100000);  
delay(10);
M5.In_I2C.writeRegister8(0x43, 0x01, 0xFF, 100000);  

Both commands are invalid.

0x03 - Set direction. "Output" for P0 is 0x01.
0x01 - Is "ID" register. It should not be written with 0xFF.

Correct sequence is

M5.In_I2C.writeRegister8(0x43, 0x03, 0x01, 100000); // P0 Direction output
M5.In_I2C.writeRegister8(0x43, 0x07, 0x00, 100000); // P0 Disable high-impedance so pin can actually drive
M5.In_I2C.writeRegister8(0x43, 0x05, 0x01, 100000); // P0 High Level

Or you just can use M5's PI4IOE5V6408_Class.

https://docs.m5stack.com/en/arduino/projects/cap/cap_lora868#31-lora-usage-example