Fix keyboard double E0-sequence release case

From Andries Brouwer <aebr@win.tue.nl>: we discard the double
release keypress, but we did it without clearing the "last byte
was E0" flag. So the next byte in the input stream would get
corrupted.

drivers/input/serio/i8042.c

@@ -410,6 +410,7 @@ static irqreturn_t i8042_interrupt(int irq, void *dev_id, struct pt_regs *regs)
 			/* work around hardware that doubles key releases */
 			if (index == i8042_last_release) {
 				dbg("i8042 skipped double release (%d)\n", index);
+				i8042_last_e0 = 0;
 				continue;
 			}
 			if (index == 0xaa || index == 0xb6)