crypto: ccp - Updates for checkpatch warnings/errors

Changes to address warnings and errors reported by the checkpatch
script.

Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/drivers/crypto/ccp/ccp-pci.c b/drivers/crypto/ccp/ccp-pci.c
index 7f89c94..1980f77 100644
--- a/drivers/crypto/ccp/ccp-pci.c
+++ b/drivers/crypto/ccp/ccp-pci.c
@@ -204,7 +204,7 @@
 
 	ret = -EIO;
 	ccp->io_map = pci_iomap(pdev, bar, 0);
-	if (ccp->io_map == NULL) {
+	if (!ccp->io_map) {
 		dev_err(dev, "pci_iomap failed\n");
 		goto e_device;
 	}