media: rc-loopback: return number of emitters rather than error
commit 6b7f554b upstream. The LIRC_SET_TRANSMITTER_MASK ioctl should return the number of emitters if an invalid list was set. Cc: stable@vger.kernel.org Signed-off-by: Sean Young <sean@mess.org> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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cb928da8
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