staging: rtl8192e: fix CamelCase variables

Fix checkpatch warnings for variables: LinkCtrlReg, DeviceID,
RevisionID, IrqLine.
Tested-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Signed-off-by: Valentin Vidic <vvidic@valentin-vidic.from.hr>
Link: https://lore.kernel.org/r/20220925123810.2492865-1-vvidic@valentin-vidic.from.hrSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8192e/rtl8192e/rtl_pci.c

@@ -16,9 +16,9 @@ static void _rtl92e_parse_pci_configuration(struct pci_dev *pdev,
 	struct r8192_priv *priv = (struct r8192_priv *)rtllib_priv(dev);
 
 	u8 tmp;
-	u16 LinkCtrlReg;
+	u16 link_ctrl_reg;
 
-	pcie_capability_read_word(priv->pdev, PCI_EXP_LNKCTL, &LinkCtrlReg);
+	pcie_capability_read_word(priv->pdev, PCI_EXP_LNKCTL, &link_ctrl_reg);
 
 	pci_read_config_byte(pdev, 0x98, &tmp);
 	tmp |= BIT4;
@@ -31,28 +31,28 @@ static void _rtl92e_parse_pci_configuration(struct pci_dev *pdev,
 bool rtl92e_check_adapter(struct pci_dev *pdev, struct net_device *dev)
 {
 	struct r8192_priv *priv = (struct r8192_priv *)rtllib_priv(dev);
-	u16 DeviceID;
-	u8  RevisionID;
-	u16 IrqLine;
+	u16 device_id;
+	u8  revision_id;
+	u16 irq_line;
 
-	DeviceID = pdev->device;
-	RevisionID = pdev->revision;
-	pci_read_config_word(pdev, 0x3C, &IrqLine);
+	device_id = pdev->device;
+	revision_id = pdev->revision;
+	pci_read_config_word(pdev, 0x3C, &irq_line);
 
 	priv->card_8192 = priv->ops->nic_type;
 
-	if (DeviceID == 0x8192) {
-		switch (RevisionID) {
+	if (device_id == 0x8192) {
+		switch (revision_id) {
 		case HAL_HW_PCI_REVISION_ID_8192PCIE:
 			dev_info(&pdev->dev,
 				 "Adapter(8192 PCI-E) is found - DeviceID=%x\n",
-				 DeviceID);
+				 device_id);
 			priv->card_8192 = NIC_8192E;
 			break;
 		case HAL_HW_PCI_REVISION_ID_8192SE:
 			dev_info(&pdev->dev,
 				 "Adapter(8192SE) is found - DeviceID=%x\n",
-				 DeviceID);
+				 device_id);
 			priv->card_8192 = NIC_8192SE;
 			break;
 		default: