Added choice to instantly retry SD init or power off

Furthermore, fix invalid usage of strcat() in error.c

src/error.c

@@ -31,6 +31,6 @@ void panic() {

void error(char *errStr) {
    gfx_con_setcol(&gfx_con, RED, 0, 0);
    print(strcat("Error: ", errStr));
    print("Error: %s", errStr);
    gfx_con_setcol(&gfx_con, ORANGE, 0, 0);
}

src/firmware.c

@@ -398,11 +398,12 @@ void firmware() {
    gfx_con_init(&gfx_con, &gfx_ctxt);
    gfx_con_setcol(&gfx_con, ORANGE, 0, 0);

    if (!sd_mount()) {
    while (!sd_mount()) {
        error("Failed to init SD card!\n");
        print("Press any key to power off\n");
        print("Press POWER to power off, any other key to retry\n");
        if (btn_wait() & BTN_POWER)
            i2c_send_byte(I2C_5, 0x3C, MAX77620_REG_ONOFFCNFG1, MAX77620_ONOFFCNFG1_PWR_OFF);
        btn_wait();
        i2c_send_byte(I2C_5, 0x3C, MAX77620_REG_ONOFFCNFG1, MAX77620_ONOFFCNFG1_PWR_OFF);
    }

    print("Welcome to ReiNX %s!\n", VERSION);