board: v2m_musca: drop CONFIG_PINMUX=y Drop CONFIG_PINMUX=y from v2m_musca_b1 and v2m_musca_s1. There's no PINMUX driver for these and the board specific pinmux.c is always enabled, so this should have no effect. Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>