iio: adc: ti-ads1298: Kconfig: add kfifo dependency to fix module build

iio: adc: ti-ads1298: Kconfig: add kfifo dependency to fix module build

Add dependency to Kconfig’s ti-ads1298 because compiling it as a module
failed with an undefined kfifo symbol.

Fixes: 00ef7708fa60 ("iio: adc: ti-ads1298: Add driver")
Signed-off-by: Arthur-Prince <r2.arthur.prince@gmail.com>
Co-developed-by: Mariana Valério <mariana.valerio2@hotmail.com>
Signed-off-by: Mariana Valério <mariana.valerio2@hotmail.com>
Link: https://patch.msgid.link/20250430191131.120831-1-r2.arthur.prince@gmail.com
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>