Tegra: compile PMC driver for Tegra132/Tegra210 platforms

The PMC driver is used only by Tegra210 and Tegra132 platforms. This
patch removes pmc.c from the common makefile and moves it to the
platform specific makefiles.

As a result, the PMC code from common code has been moved to Tegra132
and Tegra210 platform ports.

Change-Id: Ia157f70e776b3eff3c12eb8f0f02d30102670a98
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>
diff --git a/plat/nvidia/tegra/common/tegra_pm.c b/plat/nvidia/tegra/common/tegra_pm.c
index d0d2827..1f59f30 100644
--- a/plat/nvidia/tegra/common/tegra_pm.c
+++ b/plat/nvidia/tegra/common/tegra_pm.c
@@ -221,10 +221,10 @@
 	/* per-SoC system reset handler */
 	(void)tegra_soc_prepare_system_reset();
 
-	/*
-	 * Program the PMC in order to restart the system.
-	 */
-	tegra_pmc_system_reset();
+	/* wait for the system to reset */
+	for (;;) {
+		;
+	}
 }
 
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