MAINTAINERS: Update Tegra DMA maintainers

Update the Tegra DMA driver maintainer field to include the newly added
Tegra210 ADMA and add Jon Hunter as a co-maintainer for Tegra DMA.

Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

MAINTAINERS

@@ -10921,10 +10921,11 @@ M:	Prashant Gaikwad <pgaikwad@nvidia.com>
 S:	Supported
 F:	drivers/clk/tegra/
 
-TEGRA DMA DRIVER
+TEGRA DMA DRIVERS
 M:	Laxman Dewangan <ldewangan@nvidia.com>
+M:	Jon Hunter <jonathanh@nvidia.com>
 S:	Supported
-F:	drivers/dma/tegra20-apb-dma.c
+F:	drivers/dma/tegra*
 
 TEGRA I2C DRIVER
 M:	Laxman Dewangan <ldewangan@nvidia.com>