serial: cpm_uart: Remove linux/fs_uart_pd.h

linux/fs_uart_pd.h is not used anymore. Remove it.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Link: https://lore.kernel.org/r/f2cb444fa2b5776c9c51b5e46ea85edab62d1524.1691068700.git.christophe.leroy@csgroup.eu


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>