ARM: tegra: Tegra20 pinmux cleanup

This renames all the Tegra20 pinmux pins and functions so they have a
prefix which matches the type name.

The entries in tegra20_pingroups[] are all updated to remove the columns
which are no longer used.

All affected code is updated to match.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Warren <twarren@nvidia.com>
diff --git a/drivers/video/tegra.c b/drivers/video/tegra.c
index c047e6e..57cb007 100644
--- a/drivers/video/tegra.c
+++ b/drivers/video/tegra.c
@@ -229,8 +229,8 @@
 		break;
 	case STAGE_PWM:
 		/* Enable PWM at 15/16 high, 32768 Hz with divider 1 */
-		pinmux_set_func(PINGRP_GPU, PMUX_FUNC_PWM);
-		pinmux_tristate_disable(PINGRP_GPU);
+		pinmux_set_func(PMUX_PINGRP_GPU, PMUX_FUNC_PWM);
+		pinmux_tristate_disable(PMUX_PINGRP_GPU);
 
 		pwm_enable(config.pwm_channel, 32768, 0xdf, 1);
 		break;