misc: pci_endpoint_test: Terminate statement with semicolon

Terminate the misc_device->fops assignment statement with a semicolon.

Link: https://lore.kernel.org/r/1641632977-6588-1-git-send-email-wangming01@loongson.cn
Fixes: 2c156ac7

 ("misc: Add host side PCI driver for PCI test function device")
Signed-off-by: Ming Wang <wangming01@loongson.cn>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>