ARM: tegra20/30: Disable unused host1x hardware

MPE, VI, EPP and ISP were never used and we don't have drivers for them.
Since these modules are enabled by default in a device-tree, a device is
created for them, blocking voltage scaling because there is no driver to
bind, and thus, state of PMC driver is never synced. Disable them.
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

arch/arm/boot/dts/tegra20.dtsi

@@ -59,6 +59,7 @@ mpe@54040000 {
 			reset-names = "mpe";
 			power-domains = <&pd_mpe>;
 			operating-points-v2 = <&mpe_dvfs_opp_table>;
+			status = "disabled";
 		};
 
 		vi@54080000 {
@@ -70,6 +71,7 @@ vi@54080000 {
 			reset-names = "vi";
 			power-domains = <&pd_venc>;
 			operating-points-v2 = <&vi_dvfs_opp_table>;
+			status = "disabled";
 		};
 
 		epp@540c0000 {
@@ -81,6 +83,7 @@ epp@540c0000 {
 			reset-names = "epp";
 			power-domains = <&pd_core>;
 			operating-points-v2 = <&epp_dvfs_opp_table>;
+			status = "disabled";
 		};
 
 		isp@54100000 {
@@ -91,6 +94,7 @@ isp@54100000 {
 			resets = <&tegra_car 23>;
 			reset-names = "isp";
 			power-domains = <&pd_venc>;
+			status = "disabled";
 		};
 
 		gr2d@54140000 {

arch/arm/boot/dts/tegra30.dtsi

@@ -145,6 +145,8 @@ mpe@54040000 {
 			operating-points-v2 = <&mpe_dvfs_opp_table>;
 
 			iommus = <&mc TEGRA_SWGROUP_MPE>;
+
+			status = "disabled";
 		};
 
 		vi@54080000 {
@@ -158,6 +160,8 @@ vi@54080000 {
 			operating-points-v2 = <&vi_dvfs_opp_table>;
 
 			iommus = <&mc TEGRA_SWGROUP_VI>;
+
+			status = "disabled";
 		};
 
 		epp@540c0000 {
@@ -171,6 +175,8 @@ epp@540c0000 {
 			operating-points-v2 = <&epp_dvfs_opp_table>;
 
 			iommus = <&mc TEGRA_SWGROUP_EPP>;
+
+			status = "disabled";
 		};
 
 		isp@54100000 {
@@ -183,6 +189,8 @@ isp@54100000 {
 			power-domains = <&pd_venc>;
 
 			iommus = <&mc TEGRA_SWGROUP_ISP>;
+
+			status = "disabled";
 		};
 
 		gr2d@54140000 {