memory: omap-gpmc: dump "before" state before first modification

When gpmc_cs_show_timings is called in gpmc_cs_set_timings()
gpmc_cs_program_settings() was already run which modifies the CONFIG1
register. So to be more useful do the "before" dump earlier.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>