floppy: Reset the floppy motor count in floppy_drive_pio()

Reset the floppy motor count, so the motor keeps spinning 2 seconds
after a floppy operation, performed by floppy_drive_pio().

Signed-off-by: Nikolay Nikolov <nickysn@users.sourceforge.net>
diff --git a/src/hw/floppy.c b/src/hw/floppy.c
index 573c45f..77dbade 100644
--- a/src/hw/floppy.c
+++ b/src/hw/floppy.c
@@ -356,6 +356,7 @@
     // Send command.
     int ret = floppy_pio(command, param);
+    SET_BDA(floppy_motor_counter, FLOPPY_MOTOR_TICKS); // reset motor timeout
     if (ret)
         return ret;