PCI: pcie-cadence-ep: Remove redundant variable mmc

Variable mmc is being assigned but is never used hence it is redundant
and can be removed.

Cleans up clang warning:
warning: variable 'mmc' set but not used [-Wunused-but-set-variable]
Signed-off-by: Colin Ian King <colin.king@canonical.com>
[lorenzo.pieralisi@arm.com: reworked commit log]
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Alan Douglas <adouglas@cadence.com>

drivers/pci/controller/pcie-cadence-ep.c

@@ -238,7 +238,7 @@ static int cdns_pcie_ep_get_msi(struct pci_epc *epc, u8 fn)
 	struct cdns_pcie_ep *ep = epc_get_drvdata(epc);
 	struct cdns_pcie *pcie = &ep->pcie;
 	u32 cap = CDNS_PCIE_EP_FUNC_MSI_CAP_OFFSET;
-	u16 flags, mmc, mme;
+	u16 flags, mme;
 
 	/* Validate that the MSI feature is actually enabled. */
 	flags = cdns_pcie_ep_fn_readw(pcie, fn, cap + PCI_MSI_FLAGS);
@@ -249,7 +249,6 @@ static int cdns_pcie_ep_get_msi(struct pci_epc *epc, u8 fn)
 	 * Get the Multiple Message Enable bitfield from the Message Control
 	 * register.
 	 */
-	mmc = (flags & PCI_MSI_FLAGS_QMASK) >> 1;
 	mme = (flags & PCI_MSI_FLAGS_QSIZE) >> 4;
 
 	return mme;