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chameleon_parse_gdd() may fail for different reasons and end up
in the err tag. Make sure we at least always free the mcb_device
allocated with mcb_alloc_dev().

If mcb_device_register() fails, make sure to give up the reference
in the same place the device was added.

Fixes: 728ac338

 ("mcb: mcb-parse: fix error handing in chameleon_parse_gdd()")
Cc: stable <stable@kernel.org>
Reviewed-by: Jose Javier Rodriguez Barbarin <JoseJavier.Rodriguez@duagon.com>
Signed-off-by: Jorge Sanjuan Garcia <jorge.sanjuangarcia@duagon.com>
Link: https://lore.kernel.org/r/20231019141434.57971-2-jorge.sanjuangarcia@duagon.com

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>