w1: mxc_w1: Fix mxc_w1_ds2_reset_bus() return value

This patch fix mxc_w1_ds2_reset_bus() return value.
According to i.MX reference manual, "presence status" reflected
in the bit 6 of control register.

Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
1 file changed