drivers: i2s: i2s_mcux_flexcomm: Guard use of I2S_EnableSecondaryChannel

Guard use of I2S_EnableSecondaryChannel behind the SDK feature macro
that determines if this support is available, since when this macro is
not defined the SDK function is not implemented.

Fixes #68136

Signed-off-by: Daniel DeGrasse <daniel.degrasse@nxp.com>
1 file changed