mx6: mx6qsabrelite/nitrogen6x: Remove incorrect setting of gpio CS signal

The number of gpio signal is packed inside CONFIG_SF_DEFAULT_CS macro
(shifted and or'ed with chip select), so it's incorrect to pass
that macro directly as an argument to gpio_direction_output() call.

Also, SPI driver sets the direction and initial value of a gpio,
used as a chip select signal, before any actual activity happens
on the bus.

So, it is safe to just remove the gpio_direction_output call,
that works incorrectly, thus making no effect, anyway.

Signed-off-by: Andrew Gabbasov <andrew_gabbasov@mentor.com>
Tested-by: Robert Winkler <robert.winkler@boundarydevices.com>
Acked-by: Dirk Behme <dirk.behme@de.bosch.com>

board/boundary/nitrogen6x/nitrogen6x.c

@@ -336,7 +336,6 @@ iomux_v3_cfg_t const ecspi1_pads[] = {
 
 void setup_spi(void)
 {
-	gpio_direction_output(CONFIG_SF_DEFAULT_CS, 1);
 	imx_iomux_v3_setup_multiple_pads(ecspi1_pads,
 					 ARRAY_SIZE(ecspi1_pads));
 }

board/freescale/mx6qsabrelite/mx6qsabrelite.c

@@ -308,7 +308,6 @@ iomux_v3_cfg_t const ecspi1_pads[] = {
 
 void setup_spi(void)
 {
-	gpio_direction_output(CONFIG_SF_DEFAULT_CS, 1);
 	imx_iomux_v3_setup_multiple_pads(ecspi1_pads,
 					 ARRAY_SIZE(ecspi1_pads));
 }