MAINTAINERS: condense some Tegra related entries

There's little point having specific entries in MAINTAINERS for Tegra
drivers that are already covered by the top-level Tegra architecture
support entry, and maintained by people listed there. Remove the
duplicates.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

MAINTAINERS

@@ -9017,11 +9017,6 @@ T:	git git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux.git
 S:	Supported
 N:	[^a-z]tegra
 
-TEGRA ASOC DRIVER
-M:	Stephen Warren <swarren@wwwdotorg.org>
-S:	Supported
-F:	sound/soc/tegra/
-
 TEGRA CLOCK DRIVER
 M:	Peter De Schrijver <pdeschrijver@nvidia.com>
 M:	Prashant Gaikwad <pgaikwad@nvidia.com>
@@ -9033,11 +9028,6 @@ M:	Laxman Dewangan <ldewangan@nvidia.com>
 S:	Supported
 F:	drivers/dma/tegra20-apb-dma.c
 
-TEGRA GPIO DRIVER
-M:	Stephen Warren <swarren@wwwdotorg.org>
-S:	Supported
-F:	drivers/gpio/gpio-tegra.c
-
 TEGRA I2C DRIVER
 M:	Laxman Dewangan <ldewangan@nvidia.com>
 S:	Supported
@@ -9054,11 +9044,6 @@ M:	Laxman Dewangan <ldewangan@nvidia.com>
 S:	Supported
 F:	drivers/input/keyboard/tegra-kbc.c
 
-TEGRA PINCTRL DRIVER
-M:	Stephen Warren <swarren@wwwdotorg.org>
-S:	Supported
-F:	drivers/pinctrl/pinctrl-tegra*
-
 TEGRA PWM DRIVER
 M:	Thierry Reding <thierry.reding@gmail.com>
 S:	Supported