drm/amd/amdxcp: Fix warnings

Range of possible values of pdev_num is 0-63. Use int8_t as data type.
That also fixes below warnings:

>> drivers/gpu/drm/amd/amdxcp/amdgpu_xcp_drv.c:59:58: warning: '%

drm/amd/amdxcp: Fix warnings

Range of possible values of pdev_num is 0-63. Use int8_t as data type.
That also fixes below warnings:

>> drivers/gpu/drm/amd/amdxcp/amdgpu_xcp_drv.c:59:58: warning: '%d'
>> directive output may be truncated writing between 1 and 11 bytes into
>> a region of size 9 [-Wformat-truncation=]
59 | snprintf(dev_name, sizeof(dev_name), "amdgpu_xcp_%d", pdev_num);
| ^~
drivers/gpu/drm/amd/amdxcp/amdgpu_xcp_drv.c:59:46: note: directive argument in the range [-2147483648, 63]
59 | snprintf(dev_name, sizeof(dev_name), "amdgpu_xcp_%d", pdev_num);
| ^~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdxcp/amdgpu_xcp_drv.c:59:9: note: 'snprintf' output between 13 and 23 bytes into a destination of size 20
59 | snprintf(dev_name, sizeof(dev_name), "amdgpu_xcp_%d", pdev_num);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Fixes: 97d814fe4f69 ("drm/amd/amdxcp: Use unique name for partition dev")
Signed-off-by: Lijo Lazar <[email protected]>
Reported-by: kernel test robot <[email protected]>
Reviewed-by: Hawking Zhang <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>

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drm/amd/amdxcp: Use unique name for partition dev

amdxcp is a platform driver for creating partition devices. libdrm
library identifies a platform device based on 'OF_FULLNAME' or
'MODALIAS'. If two

drm/amd/amdxcp: Use unique name for partition dev

amdxcp is a platform driver for creating partition devices. libdrm
library identifies a platform device based on 'OF_FULLNAME' or
'MODALIAS'. If two or more devices have the same platform name, drm
library only picks the first device. Platform driver core uses name of
the device to populate 'MODALIAS'. When 'amdgpu_xcp' is used as the base
name, only first partition device gets identified. Assign unique name so
that drm library identifies partition devices separately.

amdxcp doesn't support probe of partitions, it doesn't bother about
modaliases.

Signed-off-by: Lijo Lazar <[email protected]>
Acked-by: Alex Deucher <[email protected]>
Acked-by: Christian König <[email protected]>
Acked-by: James Zhu <[email protected]>
Reviewed-by: Asad Kamal <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>

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