media: platform: amd: add DRM_AMDGPU dependency

With DRM_AMDGPU=m and DRM_AMD_ISP=y, it is possible to configura
VIDEO_AMD_ISP4_CAPTURE as built-in, but that fails to link:

aarch64-linux-ld: driver

media: platform: amd: add DRM_AMDGPU dependency

With DRM_AMDGPU=m and DRM_AMD_ISP=y, it is possible to configura
VIDEO_AMD_ISP4_CAPTURE as built-in, but that fails to link:

aarch64-linux-ld: drivers/media/platform/amd/isp4/isp4_interface.o: in function `isp4if_gpu_mem_alloc.isra.0':
isp4_interface.c:(.text+0x1d0): undefined reference to `isp_kernel_buffer_alloc'
aarch64-linux-ld: drivers/media/platform/amd/isp4/isp4_interface.o: in function `isp4if_dealloc_fw_gpumem':
isp4_interface.c:(.text+0x26c): undefined reference to `isp_kernel_buffer_free'

Add a dependency on the tristate DRM_AMDGPU symbol in addition to
the boolean DRM_AMD_ISP=y, so this can only be built-in if
the ISP driver is also linked into the kernel itself.

Fixes: 9a54c285630c ("media: platform: amd: Introduce amd isp4 capture driver")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Bin Du <Bin.Du@amd.com>
Tested-by: Bin Du <Bin.Du@amd.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>

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media: platform: amd: Introduce amd isp4 capture driver

AMD isp4 capture is a v4l2 media device which implements media controller
interface. It has one sub-device (AMD ISP4 sub-device) endpoint whic

media: platform: amd: Introduce amd isp4 capture driver

AMD isp4 capture is a v4l2 media device which implements media controller
interface. It has one sub-device (AMD ISP4 sub-device) endpoint which can
be connected to a remote CSI2 TX endpoint. It supports only one physical
interface for now. Also add ISP4 driver related entry info into the
MAINTAINERS file

Co-developed-by: Sultan Alsawaf <sultan@kerneltoast.com>
Signed-off-by: Sultan Alsawaf <sultan@kerneltoast.com>
Co-developed-by: Svetoslav Stoilov <Svetoslav.Stoilov@amd.com>
Signed-off-by: Svetoslav Stoilov <Svetoslav.Stoilov@amd.com>
Signed-off-by: Bin Du <Bin.Du@amd.com>
Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org>
Reviewed-by: Sultan Alsawaf <sultan@kerneltoast.com>
Tested-by: Alexey Zagorodnikov <xglooom@gmail.com>
Tested-by: Kate Hsuan <hpa@redhat.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>

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