reset: hisilicon: hi6220: add missing MODULE_DESCRIPTION() macro

make allmodconfig && make W=1 C=1 reports:
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/reset/hisilicon/hi6220_reset.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/20240607-md-drivers-reset-v1-1-5d317ff8e3bd@quicinc.com


Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>