EDAC/ppc4xx: Convert comma to semicolon

Replace a comma between expression statements with a semicolon.

Signed-off-by: Zheng Yongjun <zhengyongjun3@huawei.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20201216131846.14937-1-zhengyongjun3@huawei.com