ARM: tegra: defconfig updates

- ams AS3722 is used as system PMIC for Tegra124 based Venice2.
- NXP PCA9546 is used in Cardhu Tegra30 board to connect to 3 cameras.
- GSPCA to support the webcam on Venice2.
- Allocate 64 MiB for CMA by default; the default 16MiB is not enough
  for the majority of use-cases. This can still be overridden by the cma
  command-line option.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Bryan Wu <pengw@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

arch/arm/configs/tegra_defconfig

@@ -86,6 +86,7 @@ CONFIG_DEVTMPFS=y
 CONFIG_DEVTMPFS_MOUNT=y
 # CONFIG_FIRMWARE_IN_KERNEL is not set
 CONFIG_DMA_CMA=y
+CONFIG_CMA_SIZE_MBYTES=64
 CONFIG_MTD=y
 CONFIG_MTD_M25P80=y
 CONFIG_PROC_DEVICETREE=y
@@ -125,6 +126,7 @@ CONFIG_SERIAL_TEGRA=y
 CONFIG_SERIAL_OF_PLATFORM=y
 # CONFIG_HW_RANDOM is not set
 # CONFIG_I2C_COMPAT is not set
+CONFIG_I2C_MUX_PCA954x=y
 CONFIG_I2C_MUX_PINCTRL=y
 CONFIG_I2C_TEGRA=y
 CONFIG_SPI=y
@@ -141,6 +143,7 @@ CONFIG_POWER_SUPPLY=y
 CONFIG_BATTERY_SBS=y
 CONFIG_CHARGER_TPS65090=y
 CONFIG_POWER_RESET=y
+CONFIG_POWER_RESET_AS3722=y
 CONFIG_POWER_RESET_GPIO=y
 CONFIG_SENSORS_LM90=y
 CONFIG_MFD_AS3722=y
@@ -166,7 +169,8 @@ CONFIG_REGULATOR_TPS65910=y
 CONFIG_MEDIA_SUPPORT=y
 CONFIG_MEDIA_CAMERA_SUPPORT=y
 CONFIG_MEDIA_USB_SUPPORT=y
-CONFIG_USB_VIDEO_CLASS=m
+CONFIG_USB_VIDEO_CLASS=y
+CONFIG_USB_GSPCA=y
 CONFIG_DRM=y
 CONFIG_DRM_TEGRA=y
 CONFIG_DRM_PANEL_SIMPLE=y