drm/amdgpu: Verify bo size can fit framebuffer size on init.

drm/amdgpu: Verify bo size can fit framebuffer size on init.

To initialize the framebuffer, call drm_gem_fb_init_with_funcs which
verifies that the BO size can fit the FB size by calculating the minimum
expected size of each plane.

The bug was caught using igt-gpu-tools test: kms_addfb_basic.too-high
and kms_addfb_basic.bo-too-small

Tested on ChromeOS Zork by turning on the display and running a YT
video.

=== Changes from v1 ===
1. Added new line under declarations.
2. Use C style comment.

Cc: Alex Deucher <[email protected]>
Cc: "Christian König" <[email protected]>
Cc: Sean Paul <[email protected]>
Signed-off-by: Mark Yacoub <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>