misc: implement Tegra CAR core driver

The Tegra CAR (Clock And Reset) module provides control of most clocks
and reset signals within the Tegra SoC. This change implements a driver
for this module. However, since the module implements multiple kinds of
services (clocks, resets, perhaps more), all this driver does is bind
various sub-devices, which in turn provide the real services. This driver
is essentially an "MFD" (Multi-Function Device) in Linux kernel speak.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Tom Warren <twarren@nvidia.com>
diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index 8990489..1aae4bc 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -129,6 +129,13 @@
 	help
 	  The I2C address of the PCA9551 LED controller.
 
+config TEGRA_CAR
+	bool "Enable support for the Tegra CAR driver"
+	depends on TEGRA_NO_BPMP
+	help
+	  The Tegra CAR (Clock and Reset Controller) is a HW module that
+	  controls almost all clocks and resets in a Tegra SoC.
+
 config TEGRA186_BPMP
 	bool "Enable support for the Tegra186 BPMP driver"
 	depends on TEGRA186