tegra: video: Move LCD driver to use the DM PWM driver

Use the driver-model PWM driver in preference to the old code.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Anatolij Gustschin <agust@denx.de>
Signed-off-by: Tom Warren <twarren@nvidia.com>
diff --git a/arch/arm/mach-tegra/Kconfig b/arch/arm/mach-tegra/Kconfig
index 3857243..3540eda 100644
--- a/arch/arm/mach-tegra/Kconfig
+++ b/arch/arm/mach-tegra/Kconfig
@@ -9,6 +9,7 @@
 	select DM_KEYBOARD
 	select DM_PCI
 	select DM_PCI_COMPAT
+	select DM_PWM
 	select DM_SERIAL
 	select DM_SPI
 	select DM_SPI_FLASH