ALSA: hda: cs35l56: Fail if wmfw file is missing

ALSA: hda: cs35l56: Fail if wmfw file is missing

Fail cs35l56_hda_fw_load() and log an error if it didn't find a wmfw file
and the BIOS didn't patch the firmware already. Also remove a section of
code from cs35l56_hda_request_firmware_files() that attempted to find a
.bin if a .wmfw was not found.

The CS35L56 ROM can only provide default audio in SoundWire mode. A wmfw
is needed to enable I2S audio. Also none of the customer-specific .bin
files are compatible with the ROM firmware. So a .wmfw file is always
required.

Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Link: https://patch.msgid.link/20260709161211.686498-1-rf@opensource.cirrus.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>