drm/panel: ronbo-rb070d30: fix warning with gpio controllers that sleep

The ronbo-rb070d30 controles the various gpios for reset, standby,
vertical and horizontal flip using the non-sleeping gpiod_set_value()
function.

Switch to using gpiod_set_value_cansleep() when controlling reset_gpio to
support GPIO providers that may sleep, such as I2C GPIO expanders.

This fixes noisy complaints in kernel log for gpio providers that do
sleep.

Signed-off-by: Josua Mayer <[e-mail]>
Reviewed-by: Neil Armstrong <[e-mail]>
Signed-off-by: Neil Armstrong <[e-mail]>
Link: https://patch.msgid.link/[e-mail]

drivers/gpu/drm/panel/panel-ronbo-rb070d30.c

···
 	}
 
 	msleep(20);
-	gpiod_set_value(ctx->gpios.power, 1);
+	gpiod_set_value_cansleep(ctx->gpios.power, 1);
 	msleep(20);
-	gpiod_set_value(ctx->gpios.reset, 1);
+	gpiod_set_value_cansleep(ctx->gpios.reset, 1);
 	msleep(20);
 	return 0;
 }
···
 {
 	struct rb070d30_panel *ctx = panel_to_rb070d30_panel(panel);
 
-	gpiod_set_value(ctx->gpios.reset, 0);
-	gpiod_set_value(ctx->gpios.power, 0);
+	gpiod_set_value_cansleep(ctx->gpios.reset, 0);
+	gpiod_set_value_cansleep(ctx->gpios.power, 0);
 	regulator_disable(ctx->supply);
 
 	return 0;