video: exynos_mipi_dsim: Remove unused variable

commit 7e0be9f9 ('video: exynos_mipi_dsim:
Use the generic PHY driver') resulted in a warning about an unused
variable:

drivers/video/exynos/exynos_mipi_dsi.c:144:26: warning: unused variable
    'pdev' [-Wunused-variable]

It is indeed unused; remove it.
Signed-off-by: Olof Johansson <olof@lixom.net>
Cc: Sylwester Nawrocki <s.nawrocki@samsung.com>
Acked-by: Inki Dae <inki.dae@samsung.com>

drivers/video/exynos/exynos_mipi_dsi.c

@@ -141,7 +141,6 @@ static int exynos_mipi_dsi_early_blank_mode(struct mipi_dsim_device *dsim,
 
 static int exynos_mipi_dsi_blank_mode(struct mipi_dsim_device *dsim, int power)
 {
-	struct platform_device *pdev = to_platform_device(dsim->dev);
 	struct mipi_dsim_lcd_driver *client_drv = dsim->dsim_lcd_drv;
 	struct mipi_dsim_lcd_device *client_dev = dsim->dsim_lcd_dev;