drm/ttm: Fix spelling of "KiB"

The symbol for binary prefix kibi is "Ki", with uppercase K.
(In contrast, the symbol for decimal kilo is lowercase "k".)

Signed-off-by: Jakub Wilk <jwilk@jwilk.net>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
1 file changed