drm/radeon: Prefer strscpy over strlcpy calls in radeon_atombios.c
Use the strscpy method instead of strlcpy method.
Fixes the below:
WARNING: Prefer strscpy over strlcpy
Cc: Christian König <christian.koenig@amd.com> Cc: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Srinivasan Shanmugam <srinivasan.shanmugam@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>