media: max2175: Fix build error without CONFIG_REGMAP_I2C

If CONFIG_REGMAP_I2C is not set, building fails:

drivers/media/i2c/max2175.o: In function `max2175_probe':
max2175.c:(.text+0x1404): undefined reference to `__devm_regmap_init_i2c'

Select REGMAP_I2C to fix this.
Reported-by: NHulk Robot <hulkci@huawei.com>
Fixes: b47b79d8 ("[media] media: i2c: max2175: Add MAX2175 support")
Signed-off-by: NYueHaibing <yuehaibing@huawei.com>
Signed-off-by: NSakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>

drivers/media/i2c/Kconfig

@@ -1113,6 +1113,7 @@ comment "SDR tuner chips"
 config SDR_MAX2175
 	tristate "Maxim 2175 RF to Bits tuner"
 	depends on VIDEO_V4L2 && MEDIA_SDR_SUPPORT && I2C
+	select REGMAP_I2C
 	help
 	  Support for Maxim 2175 tuner. It is an advanced analog/digital
 	  radio receiver with RF-to-Bits front-end designed for SDR solutions.