bus: mhi: host: pci_generic: fix MHI BAR mapping

A recent change converting the MHI pci_generic driver to use
pcim_iomap_region() failed to update the BAR parameter which is an index
rather than a mask.

This specifically broke the modem on machines like the Lenovo ThinkPad
X13s and x1e80100 CRD:

	mhi-pci-generic 0004:01:00.0: failed to map pci region: -22
	mhi-pci-generic 0004:01:00.0: probe with driver mhi-pci-generic failed with error -22

Fixes: bd23e83 ("bus: mhi: host: pci_generic: Use pcim_iomap_region() to request and map MHI BAR")
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Cc: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Cc: Mayank Rana <quic_mrana@quicinc.com>
Link: https://lore.kernel.org/r/20241201171120.31616-1-johan+linaro@kernel.org

drivers/bus/mhi/host/pci_generic.c

@@ -917,7 +917,7 @@ static int mhi_pci_claim(struct mhi_controller *mhi_cntrl,
 		return err;
 	}
 
-	mhi_cntrl->regs = pcim_iomap_region(pdev, 1 << bar_num, pci_name(pdev));
+	mhi_cntrl->regs = pcim_iomap_region(pdev, bar_num, pci_name(pdev));
 	if (IS_ERR(mhi_cntrl->regs)) {
 		err = PTR_ERR(mhi_cntrl->regs);
 		dev_err(&pdev->dev, "failed to map pci region: %d\n", err);