counter: ftm-quaddec: add missing MODULE_DESCRIPTION() macro

make allmodconfig && make W=1 C=1 reports:
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/counter/ftm-quaddec.o

Add the missing invocation of the MODULE_DESCRIPTION() macro.

Signed-off-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Link: https://lore.kernel.org/r/20240602-md-ftm-quaddec-v1-1-1bbdf705ad31@quicinc.com


Signed-off-by: William Breathitt Gray <wbg@kernel.org>