soc: sunxi: sram: remove unneeded semicolon

Eliminate the following coccicheck warning:

drivers/soc/sunxi/sunxi_sram.c:197:2-3: Unneeded semicolon

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Jason Yan <yanaijie@huawei.com>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://lore.kernel.org/r/20200910140546.1191280-1-yanaijie@huawei.com