board: compal: paz00: clean up the board

Since implementation of pinctrl driver for T20 Paz00 can switch
to device tree pinmux setup along with remove of board pinmux
and some minor device tree and defconfig tweaks.

Tested-by: Agneli <poczt@protonmail.ch> # Toshiba AC100 T20
Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
diff --git a/arch/arm/dts/tegra20-paz00.dts b/arch/arm/dts/tegra20-paz00.dts
index 5d8f210..5cf604e 100644
--- a/arch/arm/dts/tegra20-paz00.dts
+++ b/arch/arm/dts/tegra20-paz00.dts
@@ -522,8 +522,8 @@
 		power-supply = <&vdd_bl_reg>;
 		pwms = <&pwm 0 5000000>;
 
-		brightness-levels = <0 16 32 48 64 80 96 112 128 144 160 176 192 208 224 240 255>;
-		default-brightness-level = <10>;
+		brightness-levels = <1 35 70 105 140 175 210 255>;
+		default-brightness-level = <2>;
 
 		backlight-boot-off;
 	};