PCI: Drop msi_data_reg() macro

msi_data_reg() doesn't provide any useful abstraction, so drop it.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

drivers/pci/msi.c

@@ -249,10 +249,10 @@ void __read_msi_msg(struct msi_desc *entry, struct msi_msg *msg)
 		if (entry->msi_attrib.is_64) {
 			pci_read_config_dword(dev, pos + PCI_MSI_ADDRESS_HI,
 					      &msg->address_hi);
-			pci_read_config_word(dev, msi_data_reg(pos, 1), &data);
+			pci_read_config_word(dev, pos + PCI_MSI_DATA_64, &data);
 		} else {
 			msg->address_hi = 0;
-			pci_read_config_word(dev, msi_data_reg(pos, 0), &data);
+			pci_read_config_word(dev, pos + PCI_MSI_DATA_32, &data);
 		}
 		msg->data = data;
 	}
@@ -309,11 +309,11 @@ void __write_msi_msg(struct msi_desc *entry, struct msi_msg *msg)
 		if (entry->msi_attrib.is_64) {
 			pci_write_config_dword(dev, pos + PCI_MSI_ADDRESS_HI,
 					       msg->address_hi);
-			pci_write_config_word(dev, msi_data_reg(pos, 1),
-						msg->data);
+			pci_write_config_word(dev, pos + PCI_MSI_DATA_64,
+					      msg->data);
 		} else {
-			pci_write_config_word(dev, msi_data_reg(pos, 0),
-						msg->data);
+			pci_write_config_word(dev, pos + PCI_MSI_DATA_32,
+					      msg->data);
 		}
 	}
 	entry->msg = *msg;

drivers/pci/msi.h

@@ -6,8 +6,6 @@
 #ifndef MSI_H
 #define MSI_H
 
-#define msi_data_reg(base, is64bit)	\
-	(base + ((is64bit == 1) ? PCI_MSI_DATA_64 : PCI_MSI_DATA_32))
 #define msi_mask_reg(base, is64bit)	\
 	(base + ((is64bit == 1) ? PCI_MSI_MASK_64 : PCI_MSI_MASK_32))
 #define is_64bit_address(control)	(!!(control & PCI_MSI_FLAGS_64BIT))