serial: 8250_pci: remove redundant assignment to tmp after the mask o…

…peration

The variable tmp is being masked with a bitmask and the value is being
written to port base + 0x3c.  However, the masked value is being written
back to tmp and tmp is never used after this. The assignmentment is
redundant, replace the &= operator with just &.

Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Reviewesd-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20211205232822.110099-1-colin.i.king@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/serial/8250/8250_pci.c

@@ -1278,7 +1278,7 @@ static int pci_quatech_init(struct pci_dev *dev)
 			outl(inl(base + 0x38) | 0x00002000, base + 0x38);
 			tmp = inl(base + 0x3c);
 			outl(tmp | 0x01000000, base + 0x3c);
-			outl(tmp &= ~0x01000000, base + 0x3c);
+			outl(tmp & ~0x01000000, base + 0x3c);
 		}
 	}
 	return 0;