iio: imu: bmi270: fix dev_err_probe error msg

The bmi270 can be connected to I2C or a SPI interface. If it is a SPI,
during probe, if devm_regmap_init() fails, it should print the "spi"
term rather "i2c".

Fixes: 92cc50a00574 ("iio: imu: bmi270: Add spi driver for bmi270 imu")
Signed-off-by: Rodrigo Gobbi <[e-mail]>
Reviewed-by: Andy Shevchenko <[e-mail]>
Signed-off-by: Jonathan Cameron <[e-mail]>

drivers/iio/imu/bmi270/bmi270_spi.c

···
 				  &bmi270_spi_regmap_config);
 	if (IS_ERR(regmap))
 		return dev_err_probe(dev, PTR_ERR(regmap),
-				     "Failed to init i2c regmap");
+				     "Failed to init spi regmap\n");
 
 	return bmi270_core_probe(dev, regmap, chip_info);
 }