oeqa/parselogs: add qemuarmv5 arm-charlcd masking

On qemuarmv5, arm-charlcd is logging an error because the device isn't
present on the virtual machine.  Mask it off, as that device could be
present on the physical hardware (and we want to use the same kernel
config as the real hardware).

Signed-off-by: Jon Mason <jdmason@kudzu.us>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>