scsi: ufs: select CONFIG_NLS

A recent change to ufshcd introduced a call to utf16s_to_utf8s, a
function that is provided by the NLS module, so we get a link error when
that is not present:

drivers/scsi/built-in.o: In function `ufshcd_read_string_desc':
:(.text+0x124d0): undefined reference to `utf16s_to_utf8s'

This adds a Kconfig 'select' statement to avoid the build error.

Signed-off-by: Arnd Bergmann <[e-mail]>
Fixes: b573d484e4ff ("scsi: ufs: add support to read device and string descriptors")
Signed-off-by: Martin K. Petersen <[e-mail]>

drivers/scsi/ufs/Kconfig

···
 	depends on SCSI && SCSI_DMA
 	select PM_DEVFREQ
 	select DEVFREQ_GOV_SIMPLE_ONDEMAND
+	select NLS
 	---help---
 	This selects the support for UFS devices in Linux, say Y and make
 	  sure that you know the name of your UFS host adapter (the card