board: nxp: common: support CONFIG_FSL_USE_PCA9547_MUX

Use select_i2c_ch_pca9547() only when CONFIG_FSL_USE_PCA9547_MUX
is set, but several call in board/nxp/lx2160a/lx2160a.c invoke
it unconditionally,
or using unrelated Kconfigs (CONFIG_EMC2305, CONFIG_VID).

Compilation with LX2160A target that omits the mux therefore fails with

  error: implicit declaration of function 'select_i2c_ch_pca9547'

Add a static inline stub with -EOPNOTSUPP for the
!CONFIG_FSL_USE_PCA9547_MUX case so all cases compile cleanly.

Adapted from the convention used by include/scmi_nxp_protocols.h for
SCMI subprotocol stubs.

There is no functional change for NXP boards: all eight upstream
LX2160A defconfigs (lx2160ardb / lx2160aqds / lx2162aqds and their
secure / stmm / verified_boot variants) already set
CONFIG_FSL_USE_PCA9547_MUX=y, so the real declaration wins.

The purpose is to support new boards that do not use the PCA9547.

Signed-off-by: Vincent Jardin <[email protected]>
Reviewed-by: Peng Fan <[email protected]>
Signed-off-by: Peng Fan <[email protected]>

0 files changed, 0 insertions, 0 deletions