staging: r8188eu: clarify that bb_reg_dump uses only path a

The path variable is always 0 in bb_reg_dump. Remove the path variable
and replace the constant 0 with RF_PATH_A to make it clearer that path
a is used.
Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Link: https://lore.kernel.org/r/20220212161737.381841-6-martin@kaiser.cxSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/r8188eu/os_dep/ioctl_linux.c

@@ -3538,13 +3538,13 @@ static void bb_reg_dump(struct adapter *padapter)
 
 static void rf_reg_dump(struct adapter *padapter)
 {
-	int i, j = 1, path = 0;
+	int i, j = 1;
 	u32 value;
 
 	pr_info("\n ======= RF REG =======\n");
-	pr_info("\nRF_Path(%x)\n", path);
+	pr_info("\nRF_Path(%x)\n", RF_PATH_A);
 	for (i = 0; i < 0x100; i++) {
-		value = rtl8188e_PHY_QueryRFReg(padapter, path, i, 0xffffffff);
+		value = rtl8188e_PHY_QueryRFReg(padapter, RF_PATH_A, i, 0xffffffff);
 		if (j % 4 == 1)
 			pr_info("0x%02x ", i);
 		pr_info(" 0x%08x ", value);