nvidia: use kernel overlay features

Update all Kconfig files and Makefiles to rely on the kernel overlay
feature. In particular, don't include any Kconfig files or Makefiles
from other overlays. -I directives in CFLAGS are not yet cleaned up.

Bug 1978395

Change-Id: I425d37d55f8ea61fb3a082a1504f994ff30cec03
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1561187
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

2 files changed, 2 insertions, 0 deletions

diff --git a/drivers/padctrl/Kconfig.nvidia b/drivers/padctrl/Kconfig
index b81b1b169..5696fec65 100644
--- a/drivers/padctrl/Kconfig.nvidia
+++ b/drivers/padctrl/Kconfig
@@ -1,4 +1,5 @@
 if PADCTRL
+
 config PADCTRL_GENERIC_TEGRA_IO_PAD
         bool "Generic Tegra IO Pad control driver"
         depends on ARCH_TEGRA
@@ -7,4 +8,5 @@ config PADCTRL_GENERIC_TEGRA_IO_PAD
 
           Tegra IO Pad padctrl driver which controls the IO pad
           configuration for 1.2V, 1.8V and 3.3V.
+
 endif
diff --git a/drivers/padctrl/Makefile.nvidia b/drivers/padctrl/Makefile
index b7a726230..b7a726230 100644
--- a/drivers/padctrl/Makefile.nvidia
+++ b/drivers/padctrl/Makefile