serial: mxs-auart: support CMSPAR termios cflag
If CMSPAR is set in the c_cflag of termios, "stick" parity is enabled. Tested on an i.MX28 system Signed-off-by: Wolfgang Ocker <weo@reccoware.de> Acked-by: Stefan Wahren <stefan.wahren@i2se.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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